Orcs and Trolls is the thing you are going to see for most of the game, in level 14 and 15 there's the bats, who cares kill them it's easy. Mages? A joke too, spam balls till they die. Scrolls don't matter, play the god damn game and you won't miss anything except for the secret exit maybe, idk.

You better have been saving your bolts and nukes for these last sections, mostly level 20, which I did not 100% because I'm not gonna kill 50+ demons by spamming.

There's no variety on spells which is kinda sad.

Nemesis, the big bad boy that looks like fake hitler from wolfenstein 3d, can be ignored. Just shoot the back of the room he's in, your friend is there and you can happily end the game.