The Kingdom of Loathing

I just remembered that prismatic damage wasn't even working for me, with the stuff I had equipped I should have been doing 30+ prismatic damage per hit, but my attacks against all the warbears on level 2 were doing 10 damage, including the prismatic damage. every bit of damage I did had a hard-cap of 10 damage, I had to use insta-kill skills and items to kill any of them.

I just can't figure out a strategy that actually works against them. Even if I do manage to survive against them, I can't do any damage to actually kill them.