I'm running a mist elf ranger, and found a GUV of some kind at the bottom of the Giant Caves. Since I don't care about aging, I figured it would be fun to finish it off.
So me and my five blessed drakish scurgari or returning went Lich hunting.
Started around level 21, ending level 25, victory is mine! At least Greater Undead Vault victory! And not much stat damage in the end.
Spoils: far slayer and black thumb.
useful skills:
Find Weakness: 100
Dodge: 100
Alertness: 100
Backstabbing: 100
Archery: 100
Other things of interest:
Stilts corruption, Boom/scurguri skill: 13, and range talents.
In the end, it's very, very grindy to finish, but I did it.
Won't do it again!