#6 Killing those floating eyes
Only one time did I side with the rebel Duergar. They wanted me to get rid of them. (You know, as eyeballs of the Absolute, doing stuff in front of them seems of little consequence. Call a few nearby randos to a fight? BD. At some point, you'd expect it to dispatch a platoon to getcha!)
So I lured it down the stairs and tossed it into the water. Done.
Waiiiiiiit... Several playthrus back, I tossed one into the lava. It just floated there for ever and ever and I couldn't complete combat. I forgot what I did but it didn't instantly die.
Floating over water, bad! Floating over lava, A-Ok!