Gotta Save your wyvern poison for her, i believe Astarion can prock it 3 times
BattleMaster Lae'zel can terrify her as well
I always use the wyvern poison on Priestess Gut so she doesnt call for help.
There are two wyvern poisons you can get . . . so both can be options. But for the hag its just trivially easy to knock (or pull) her into the pit, sure you miss some loot but whatever.
