how to get to witch hut? im looking around swamps and nothing, also priestess don't have lost acolytes quest
First you have to finish the quest with Restrain Potion, after you make that one the Priestess will have a new quest for you.
Which hut is unlocked by an event in the swamp. But the chance for it occur is randomized.
Ah right. To access the witch hut you first need to have the lost acolyte quest - it lets you unlock the dark swamp area and there you can find witch hut.