My
Dwarf Oozemancer just won the Nightmare difficulty.
Of course, being an Oozemancer, he was already very strong before entering High Peaks, but very powerfull he became before entering in the Sanctum thanks to some rather amazing random items (that were on a merchant superitem level of awesome) looted from the many High Peaks bosses that increased his willpower to some insane 180 and cunning to 120 !
Giving him a mindpower of 102 for dealing amazing damage and having his Silence working greatly.
The Sanctum battle was even easier than with my Normal difficulty Oozemancer win with this huge Mindpower, despite the 2 bosses were overcheating with their levels and insanely higher health than in Normal ( they were both more than level 100 ! )
The Sun Paladin wasn't much better than her Normal difficulty version, it's a miracle she survived (though she can say thanks to my healing touch).
But it didn't mattered, with such a mindpower >100 and being an Overpowermancer
, my character teared them apart with insane damage on very high penetration.
The most difficult battle he had, out of the Worm that Walks unique that i mentioned previously and managed to beat at level 30 in my fortress was the Slime Tunnel boss that appears for the undead pillar "Neverdead Something".
That thing was nearly unkillable (and to make things worse he even resurrected), took forever to kill him and i managed only because i had healing and regen from everywhere (thanks to Fungus tree, i would hate to see what a normal class without Fungus would do there).
The major difficulty is that he often casted some darkness obscuring the whole scene, and even if i was immune to blindness, i had nothing in stock (no vision/sun rune because i had to use better runes and i had no skill to track him as i never though i would really need one at that point of the game, something i'll reconsider for other characters) to see him as he liked to phase door a lot in that darkness too so i could never figure out where he exactly was to shoot him.
Meanwhile he was regenerating/stealing my health to 100% quickly when left unchecked.
And as all good superundead as he is, he was summoning legions after legions of undead to confuse me even more on where he could be (difficult to navigate even with Movement when the screen is filled with undead everywhere in that darkness, looks like he was insanely cheating as i killed maybe more than a hundred of his undeads, while even with highest level of animus yourself can only have up to 19 souls in stock, and he never used the Curse of the Meek spell to refill.
To make things worse, i casted maybe a dozen of time Silence but every single time he resisted the effect, i wasn't near the insane Mindpower i had after looting High Peak, but still it was endgame-ready, can't believe he could resist so much time.
And despite my Spell Feedback prodigy it does not look like it disturbed him much
Finally at some point, using my movement rune a lot to get in melee distance from him, it was easier to relocate him into the darkness, and after a long , so very long battle and despite his resurrection i finally managed to put him down without dying (though several close calls during that battle due to the focus fire of his many undead and himself).
Anyways, that's done, unlocked the insane difficulty that i will never play.
But i really wonder how some of the battles can play without the Fungus tree, even as a Oozemancer and despite the bloated ooze sharing my damage , there were -many- time my health was dropping fast, i can't imagine how it would have been possible to not die with a character less strong than an Oozemancer or without as much heal/regen as Fungus allow you to have.
I didn't thought Oozemancer were still that strong enough to take on Nightmare that "easily" (out of a few hard fights) , i wonder if they're still good enough for Insane, but i will not try, masochism has its limits