I killed both Terrors, one at a time thanks to the door trick.
Level 25 Assassin, level 25 Priest, Level 18 Scholar, and Level 25 Paladin. I did have to use a divine intervention scroll. I'm 10 levels higher now and have finished the 1st act. Now I guess I get to die, but I had to do a Grandmaster run (Finally!), and I'm going to enchant all my junk and see what I get. I like enchanting more than anything else in the game One thing I have noticed is that very few creatures can stand up to my group. Too bad there's not a difficulty slider. I haven't done the lich lab though and I hear it can be brutal. I may tackle it before I commit seppuka. (Drownuka?)