well if you doing such things , then you probably should get axe from minotaur king long ago, he isnt very dificult to kill., for mauls only ape maul and troll boss maul are usefull , because they are quite easy to get fast and have nice damage and extra stun, still mauls are slow. I killed recently lazy devil with 25 max geared warior and 24 max book feeded grisenda, spamming like 6 resurect scrolls(on hard), but i guess i was a bit lucky with him not paralyzing me too much. As for witches its easy fight, you just need to run away as soon as they are triggered , and this way you can kill first their pets and later fight them 1 by one as they will scatter a lot.