Where to find Demonologists?

[marc]

I just got to lvl 30 with my mage on impossible, but I didn't find demonologists anywhere. They look like the coolest new unit and I really want to try them, but I have all islands unlocked and didn't find any. :(

Does anyone know if there's a guaranteed source of them in the game?

[Elwin]

think there is no such fot these unit ... there is possible you will not have them. I am lucky bacause i have few places witth plenty of tthem but its random

[Infiltrator]

I feel you man. I only found 17 of them in onc place, but no luck elsewhere. I'm lvl 24 and I've tried nameless and shattara too. Maybe they'll get unlocked in one of those places.