How to kill Baal; mage on impossible

[ckdamascus]

I am a little surprised, but I cannot win against Ktahu even with 290 black knights! (using flaming eye scroll and the helm + staff)

I am a level 54 mage with all the nifty spells. However, I do not have frenzy. Does frenzy increase attack rating over time? Should I be using hells' breath? My black knight's attack rating is merely around 62ish or so. How are you guys getting it up to 100+?

Stone skin works, but mark of death seems to counter it. If I had any phys resistance items, I probably sold them by now.

Eviln is strong, but it takes casting time and a turn from the black knights to recover. Not to mention most of the time, the enemies swarm over the bodies or the Tirex's will eat them before I could use them anyway. Maybe I am using eviln improperly?

I really could use the splinter of darkness by now, but I got moro too late, so I just killed him. Maybe I should just use royal griffons instead with insane buffs?

Seems pretty sad that my mage has a LOT of trouble against the bosses. I barely beat the gremlin boss by using black knights, but lost about half of them (simply no bodies to evilN back, and I was a bit too impatient in waiting for a summoning box just to evilN them back). Is it me? Or is that boss fight really tedious? Is there a faster/stronger way to womp these bosses? I don't mind good tactics, but I really hate tedious battles. Is it faster and more fun with a warrior?

I have already re-started a new campaign with the gift pack, but if I cannot figure out why I am severely losing now, I don't think replaying this is going to get me there.