Hi jayar, welcome back
Mage armor is found on non medable armor (metal and studded) if they have it on, you will be able to med whilst wearing that armor.
Mage weapon makes your magery skill act as a weapon skill, e.g. if you have 120 magery skill and equip a katana with mage weapon -21 skill, your magery skill will go down to 99 and it will act as though you have 99 swordsmanship skill. You can counteract the loss of the magery skill using jewelry with +magery skill on it. So if you also equip a ring and bracelet with 21 or more magery skill on them, you will be back to 120 magery, which while you have the katana equiped, will also act as 120 swordsmanship.
Or you could use the artifact, Staff of the Magi, which has magery weapon -0 skill. This way you would lose none of your magery skill and not need any magery skill on jewelry. In this case though, your magery skill would be acting as 120 macing skill, as the Staff of the Magi is a macing weapon. This makes it easier for you to hit others, and harder for others to hit you.
Theres also another mod you can find on weapons, and shields, thats useful for a mage, Spell Channeling (SC). If this is on a weapon, you can cast spells without them dropping into your backpack.
As for mage templates, I use the following:
Eval 110
Inscription / resist 100
Magery 120
Med 100
Necro 99
Spellweaving 120
Spirit Speak 80
I swap out inscription for resist, or vise versa, using soulstones.
I use it for Doom guantlet, peerless and champ spawns with groups mostly, but I've also used it for solo hunts in the old tram dungeons. I was able to go right to the end of Deciet on my own, to the lich lords .. using an undead slayer spellbook though which makes it alot easier.
You will need Mondain's Legacy for the Spellweaving skill.
Before putting Spellweaving on, I had this, which I used for Doom guantlet and peerless.
Eval 110
Inscription / resist 100
Magery 120
Med 100
Necro 99
Poisoning 80
Spirit Speak 120
For more on templates, I suggest you look at the stickies, some good info there
For equipment I would look at getting 100 Lower Reagent Cost (LRC), 40 Lower Mana Cost (LMC) and atleast 50 in all resists, 60 would be better, and 70 would be brilliant

Some other good mods to try and get on your suit would be, Mana Regen (MR), Mana Increase (MI), Spell Damage Increase (SDI) and Defense Chance Increase (DCI) - I don't think DCI is really needed in PvM, but its handy. I'm not sure about PvP as I don't do it, but I would think it'd be highly recommended to have it.
Some good artifacts to look for would be:
Arcane Shield
Armor of Fortune - tunic
Bloodwood Spirit - talisman
Boomstick
Brightsight Lenses
Hat of the Magi
Inquisitor's Resolution - gloves
Ornament of the Magician - bracelet
Pendant of the Magi
Scrapper's Compendium - spellbook
Shield Of Invulnerability
Staff of the Magi
Staff Of Power
Stitcher's Mittens
Totem Of The Void - talisman
I've only listed the ones that I've seen mainly used by PvM mages, but there are more .. especially when thinking of PvP. For a better list, look
here,
here,
here,
here, and
here.
Hope this helps
