I do not have a provoker. I am going to go with Magery and Provoke using the mage weapon. Or no provoke and take all skills to 120. It would look like this...
120 Music
120 Disco
120 Magery
120 Mystic
120 Focus
100 ????
Simple but I can always change it up once I get used to the basics of the template. To much at one time leads me to doing nothing at all lol. Last slot maybe Med, Provoke, Eval? Maybe Magery to 100 and provoke to 120. Hell I don't know. If I go train some in doom any advice for someone who has never been in there?
You only have 700 skill points? I would suggest using the Crystalline Ring and having 120 real skill in Provoke, 100 Focus, the 20 Magery it has would take care of the Mage Weapon.
If you have Med you won't be able to build 55 LMC, as you can only do this with non med armor as far as I recall. You still could, I just don't think it's worth it.
If you're on Atlantic I'll go Doom with you if you want, I quite like messing around there.
Otherwise I would point out that the rooms lock when you go in them, and the only way out is to kill the monster or as a ghost. They activate one at a time in a clockwork fashion. So unless the Dark Father has been left up in the very center (which it normally has) then run around the rooms anti clockwise until you find the active one.
Going clockwise:
Room 1: Undead, weakest to fire
Room 2: No slayer, equally weak to cold and fire, if there are Necros in there with you then go for fire as they will be using corpse skin which puts fire down and cold up
Room 3: Demon, weakest to fire and poison
Room 4: Undead, weakest to energy
Room 5: Demon, weakest to physical, I think it has very high fire resist too
Middle of all the rooms is where the Dark Father spawns: Demon, equal resists, unless Necros are casting corpse skin (including Lich Lords that you can Provoke)... but generally unless you're the Necro I wouldn't concern yourself with it's weakest resist.
Tactics- For all monsters apart from room 2 use the Gwenno's Harp Demon/Undead slayer, for room 2 use an exceptional.
Room 1: Stone Form, Discord, set mastery book to fire, use Despair, summon Colossus, heal yourself, dispel revenants, and move from melee range, take a trap box to avoid parra
Room 2: Stone Form, Discord, Colossus, move so that the Flesh Renderer moves onto the same tile as the Colossus, this will cause it t retarget it rather than you, you could try using Sleep too but I'm not sure if they have high resist (it would be a comparison between your Focus and it's Resisting Spells), once it's attacking the Colossus stay on the tile next to it, if you move it will move and target you again. If Colossus is getting dispelled too easily use Earth Elementals (which you can also heal), when you are comfortable, you can set mastery book to cold/fire and use Despair/Tribulation, and Hail Storm if you have the mana for it. You can also Mindblast which is also cold damage and not dependent on having Eval.
Room 3: Stone Form, Discord, Colossus, set mastery book to fire/poison, Despair/Trib, and walk a few tiles ahead.
Room 4: Stone Form, Discord, Colossus or EV's (EV's may do better as their melee is energy damage and there are two of them), set mastery book to energy, Despair/Trib, Eagle Strike
Room 5: Stone Form, Discord, Colossus, set mastery book to physical, Despair/Trib, Bombard... alternatively... as this is a Necro you may want to do it mounted, the reason being it can Blood Oath and you have no Resist, and Despair will probably be doing around 100, being mounted you can run out of range quickly to end the spell song, or just be very quick on the macro ready to toggle it off (I don't personally have my spellsongs macrod)... if you do this mounted, or if you find it hard to keep up with healing you could use just Colossus, and use the Prov mastery for additional HP and healing. It would take longer this way and I find it not really necessary.
Dark Father: Discord, Colossus, Provoke it's own spawn back on it, primarily Lich Lords and Rotting Corpses, and Bone Knights. Stay mounted until you're comfortable with it. Don't hit it with any direct spells until you are very good at it, least of all on foot, because if you hit it at range it gets a speed increase and hunts you down. This is because any direct damage you throw at it, it has a chance of counter attacking by throwing bones at you, some of which will land on the floor and create Undead spawn.
Until you're very good at staying alive on this template I wouldn't reccomend using Despair or Trib, as their damage effects will cause a huge spam of counter attacks. It's perfectly possible to do it that way I even have a thread in the Bard forum somewhere doing it like that. If you are going to try using Despair/Trib, stand next to or on top of the Dark Father (while it's Provoked), and turn them off again before moving away. But again until you're good, you should probably use the Prov mastery to help you heal, and just Discord/Provoke/Colossus it to death.
Edit:
https://stratics.com/community/threads/newly-rebuilt-suit.330207/
Here is a link to doing it with a good setup and a lot of experience, using Despair/Trib. Though not a Mystic, and I had Resist at the time I think.