location: skull crusher cave 2nd level
I'm not sure if this was intended. But As Tralek, Ni'haer, Vrebel, myself (feh) and Isherwood went down there, we killed all the giants.. painfully.. lots and lots of well nasty spells

. Vrebel had died so Isherwood raised him. But then we barely finished mining, And I do say barely, barely 8 minutes passed by before the whole cave re-spawned on us.
So not sure if this is intended to be -that- quick, but if it's not then it's a bug in the re-spawn timer of those spawns there.