Actually I was unable to find any good talisman guide, so I've decided to write one.
WHERE TO FIND TALISMANS
Talismans can be found in any ML creature, but the really good ones can be found only in 2 places:
1) Strong boxes
Best way to farm this is doing the Travesty with many people and gather the minax orders from the ground (it spawn 1 order for each person in the area). This quest can be done only once per character BUT you can make new characters to do the quest
Strong boxes can also have from 0 to 4 relic items inside
2) ML Peerless loot
There are many peerless that can be done easily in solo, but the chance to get a good talisman without luck is very low, so if you want to gather talismans remember to go with high luck suit.
Peerless also usually drop 2-3 relic items (much more with a luck suit).
3) Alchemy and inscription better talismans can be get from the britain library: My Book and Treatise on Alchemy talismans. You have just to waste some gold/resources to get this, but you have good chance to get a good talisman.
WHAT TALISMANS WORTH TO HAVE
There are talismans for every crafting skill, but are all them necessary?
No, and now I'll give more details skill by skill:
Blacksmith
Blacksmith once to 120 have high chance to make everything, with an ancient smith hammer +30 you have 100% success and exceptional on almost everything.
So you DON'T need a talisman for blacksmith.
Also a high level (25% or more exceptional) Blacksmithing talisman can be used in conjuction with a +15 Ancient Smith Hammer, instead of using an ASH +30, for most crafting (I think everything except the platemail Kabuto helms, and maybe the Platemail Do).
Tailoring
Tailoring at 120 allow you to make many items at 100% success (like the leather armors), but if you need to make items like the gargish or studded armors, you need a talisman.
- If you want to make gargish leather, studded or bone armors exceptional, you need to find a talisman with 2% success chance bonus and 30% exceptional
- If you want to make gargish cloth armors, you need a 30% success chance and 30% exceptional talisman, but still you will reach up to 82% chance to make the chest.
Alchemy
Due to the addition of the black powder alchemy requires a 30% success chance talisman. Around you can find talismans with exceptional chances on alchemy but don't waste your money to try getting the 30% exceptional, because alchemy have nothing that can be made exceptional (except the howering wisp - useless)!
Glassblowing
Glassblowing allow to make a lot of deco items and few useful thing that unfortunately requires a higher success bonus. So glassblowing requires at least 30% success chance bonus in order to make the soulstone fragment at 90% chances. The exceptional bonus can be avoided since the only thing that would requires that bonus are the glass staff and glass sword that actually are not so good...
Carpentry
Carpentry requires an high bonus in order to make the woodland armor succesfully, the bramble coat and the others craftable armors will requires more success chance but actually have no use. Thanks to the woodworker's bench, you can use a less powerfull talisman.
- For a cheap and optimal use of the skill you need to use a 25% bonus and 27% exceptional and you'll be able to make everything with 100% success (except the artifacts armors).
- If you really want to make the artifact armors at 95% success instead of 90%, then you need a 30% success and 27% exceptional
Masonry
Masonry allow you to make some deco items and the gargish stone armor. Unfortunately the success chance in almost every item is very low so you need a 30% success chance and 30% exceptional talisman. Exceptional chance can be avoided if you don't care to make stone armors.
Bowcraft
To being able to make almost everything with high success chance you need a 30% success and 30% exceptional bonus talisman.
Cooking
Cooking allow you to make few useful things, but unfortunately some of them requires high bonus, so you need a 30% success chance talisman. The exceptional chance can be ignored, since there are no bonus in use exceptional cooking items...
Tinkering
Tinkering has a lot of items that requires a high bonus (like the pendant of the magi). So you need a 30% success chance talisman and ignore the exceptional chance, since there is no bonus to make exceptional items (except the few weapons and few tools that do not have 100% success chances but costs 2 ingots to retry)
Inscription
Making spellbooks have a low success chance so you need the higher bonus: 30% success chance talisman.
The exceptional chance is almost useless if you don't want an high chance to make exceptional runebooks.
Cartography
You'll need a 30% success bonus only to make the tattered wall map.
The bonus do not influence the success of decoding a treasure map.
STRONGBOX QUESTS
Elder Brae the Wise (Sanctuary): kill 1 shimmering effusion. Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Siarra the Keeper of Tradition (Heartwood): kill 1 shimmering effusion. Gives 3 strongbox - ONCE PER CHARACTER
Yorus the Tinker (Compassion Gypsy Camp): kill 1 irk, 1 guile, 1 spite - ONCE PER CHARACTER
Sarakki the Notary (Britain): obtain the minax order (in the loot of the travesty). Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Calendor the Keeper of Tradition (Heartwood): kill 1 dread horn. Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Oolua the Keeper of Tradition (Sanctuary): kill 1 dread horn. Gives 3 strongbox - ONCE PER CHARACTER
Dallid the Cook (Sanctuary): kill 3 boss inside the sanctuary (heavy spawn of changeling, rat mages, ratman archers, gargoyles, succubi) (too high the risk vs reward)
Elder Acob the Wise (Heartwood): kill 1 Serpent's Fang High Executioner, 1 Tiger's Claw Thief, 1 Dragon's Flame Mage in The Citadel (slow spawn, requires too much time)
Lorekeeper Broolol the Keeper of Tradition (Heartwood): deliver 3 minotaur artifacts (from labyrinth) and a Fragment of a Map (from priests of mondain loot) (if you gather enoug minotaurs artifacts, gaman horn and priest of mondain's map is the best)
Lorekeeper Rollarn the Keeper of Tradition (Sanctuary): deliver 3 minotaur artifacts (from labyrinth) and a Fragment of a Map (from priests of mondain loot) (if you gather enough minotaurs artifacts, gaman horn and priest of mondain's map is the best)
Correspondence from Minax (item in the travesty room): deliver the item to Sarakky (Britain) (if you gather enough is very good, but you have to farm the travesty a lot of times)
I think that's all what is worth to know about talismans, but there is always space to add more
WHERE TO FIND TALISMANS
Talismans can be found in any ML creature, but the really good ones can be found only in 2 places:
1) Strong boxes
Best way to farm this is doing the Travesty with many people and gather the minax orders from the ground (it spawn 1 order for each person in the area). This quest can be done only once per character BUT you can make new characters to do the quest
Strong boxes can also have from 0 to 4 relic items inside
2) ML Peerless loot
There are many peerless that can be done easily in solo, but the chance to get a good talisman without luck is very low, so if you want to gather talismans remember to go with high luck suit.
Peerless also usually drop 2-3 relic items (much more with a luck suit).
3) Alchemy and inscription better talismans can be get from the britain library: My Book and Treatise on Alchemy talismans. You have just to waste some gold/resources to get this, but you have good chance to get a good talisman.
WHAT TALISMANS WORTH TO HAVE
There are talismans for every crafting skill, but are all them necessary?
No, and now I'll give more details skill by skill:
Blacksmith
Blacksmith once to 120 have high chance to make everything, with an ancient smith hammer +30 you have 100% success and exceptional on almost everything.
So you DON'T need a talisman for blacksmith.
Also a high level (25% or more exceptional) Blacksmithing talisman can be used in conjuction with a +15 Ancient Smith Hammer, instead of using an ASH +30, for most crafting (I think everything except the platemail Kabuto helms, and maybe the Platemail Do).
Tailoring
Tailoring at 120 allow you to make many items at 100% success (like the leather armors), but if you need to make items like the gargish or studded armors, you need a talisman.
- If you want to make gargish leather, studded or bone armors exceptional, you need to find a talisman with 2% success chance bonus and 30% exceptional
- If you want to make gargish cloth armors, you need a 30% success chance and 30% exceptional talisman, but still you will reach up to 82% chance to make the chest.
Alchemy
Due to the addition of the black powder alchemy requires a 30% success chance talisman. Around you can find talismans with exceptional chances on alchemy but don't waste your money to try getting the 30% exceptional, because alchemy have nothing that can be made exceptional (except the howering wisp - useless)!
Glassblowing
Glassblowing allow to make a lot of deco items and few useful thing that unfortunately requires a higher success bonus. So glassblowing requires at least 30% success chance bonus in order to make the soulstone fragment at 90% chances. The exceptional bonus can be avoided since the only thing that would requires that bonus are the glass staff and glass sword that actually are not so good...
Carpentry
Carpentry requires an high bonus in order to make the woodland armor succesfully, the bramble coat and the others craftable armors will requires more success chance but actually have no use. Thanks to the woodworker's bench, you can use a less powerfull talisman.
- For a cheap and optimal use of the skill you need to use a 25% bonus and 27% exceptional and you'll be able to make everything with 100% success (except the artifacts armors).
- If you really want to make the artifact armors at 95% success instead of 90%, then you need a 30% success and 27% exceptional
Masonry
Masonry allow you to make some deco items and the gargish stone armor. Unfortunately the success chance in almost every item is very low so you need a 30% success chance and 30% exceptional talisman. Exceptional chance can be avoided if you don't care to make stone armors.
Bowcraft
To being able to make almost everything with high success chance you need a 30% success and 30% exceptional bonus talisman.
Cooking
Cooking allow you to make few useful things, but unfortunately some of them requires high bonus, so you need a 30% success chance talisman. The exceptional chance can be ignored, since there are no bonus in use exceptional cooking items...
Tinkering
Tinkering has a lot of items that requires a high bonus (like the pendant of the magi). So you need a 30% success chance talisman and ignore the exceptional chance, since there is no bonus to make exceptional items (except the few weapons and few tools that do not have 100% success chances but costs 2 ingots to retry)
Inscription
Making spellbooks have a low success chance so you need the higher bonus: 30% success chance talisman.
The exceptional chance is almost useless if you don't want an high chance to make exceptional runebooks.
Cartography
You'll need a 30% success bonus only to make the tattered wall map.
The bonus do not influence the success of decoding a treasure map.

STRONGBOX QUESTS
Elder Brae the Wise (Sanctuary): kill 1 shimmering effusion. Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Siarra the Keeper of Tradition (Heartwood): kill 1 shimmering effusion. Gives 3 strongbox - ONCE PER CHARACTER
Yorus the Tinker (Compassion Gypsy Camp): kill 1 irk, 1 guile, 1 spite - ONCE PER CHARACTER
Sarakki the Notary (Britain): obtain the minax order (in the loot of the travesty). Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Calendor the Keeper of Tradition (Heartwood): kill 1 dread horn. Gives 3 strongbox - ONCE PER CHARACTER
Lorekeeper Oolua the Keeper of Tradition (Sanctuary): kill 1 dread horn. Gives 3 strongbox - ONCE PER CHARACTER
Dallid the Cook (Sanctuary): kill 3 boss inside the sanctuary (heavy spawn of changeling, rat mages, ratman archers, gargoyles, succubi) (too high the risk vs reward)
Elder Acob the Wise (Heartwood): kill 1 Serpent's Fang High Executioner, 1 Tiger's Claw Thief, 1 Dragon's Flame Mage in The Citadel (slow spawn, requires too much time)
Lorekeeper Broolol the Keeper of Tradition (Heartwood): deliver 3 minotaur artifacts (from labyrinth) and a Fragment of a Map (from priests of mondain loot) (if you gather enoug minotaurs artifacts, gaman horn and priest of mondain's map is the best)
Lorekeeper Rollarn the Keeper of Tradition (Sanctuary): deliver 3 minotaur artifacts (from labyrinth) and a Fragment of a Map (from priests of mondain loot) (if you gather enough minotaurs artifacts, gaman horn and priest of mondain's map is the best)
Correspondence from Minax (item in the travesty room): deliver the item to Sarakky (Britain) (if you gather enough is very good, but you have to farm the travesty a lot of times)
I think that's all what is worth to know about talismans, but there is always space to add more