I haven’t played in a while and am not having any luck getting the key I need for Depraved Sanctuary. I am a Level 20 Arcanist. Any help would be appreciated.
If you can (still) make the deal with Direni, you can get the key from there.
Else you will have to clear the areas infront of the sanctuary’s entrance and/or the cultist areas around Foggy Banks until you find the key.
It’s pure chance, so perhaps you are just having really bad luck; usually it doesn’t take more than a few full clears of those areas to get the key.
Many thanks Space-time Mogul!