dunno if this is a repost, therefore i'll keep it short.
Ac2, 3rd Quest, "LAIR OF THE WITCH"
tp to "Black Canyon Mines"
follow this path, chest #1 location
http://img72.imageshack.us/img72/7493/chest1q.jpg
you have to finish the quest, you have to protect dat guy from goblins
this chest will be ur reward
http://img836.imageshack.us/img836/370/questman.jpg
you might run into this goblin shaman thingy sometimes
http|://img12.imageshack.us/img12/2524/redbumbum.jpg
keep going an you'll find
http|://img826.imageshack.us/img826/8279/liftlever.jpg
pull the trigger and the chest is yours
now run to this location...
the stone has to be there otherwise just port back and repeat
http|://img338.imageshack.us/img338/1243/thestone.jpg
once you've found the stone go to this location,
you can safely dps from there
http|://img594.imageshack.us/img594/4184/safedps.jpg
chest #2 location
http|://img717.imageshack.us/img717/4898/chest2u.jpg
i found my lacuni prowlers there,
GL