When a constitution draining monster lands a successful stat drain use kluusars amulet to steal his hitpoints. When you defeat the monster rest and then remove kluusars. Re-arm your old necklace. Your hitpoints will recover at what you took and above what you had even before your stats return to normal. This trick gives even more back when you are in barbarian rage. Also this trick works even better when you engage combat wearing a constitution bonus necklace - I had +1 constitution necklace before battle was engaged. Maybe this trick will work with other stat altering beasts and and same stat altering gear. Who knows, dust off the game and give it a shot!