I'm trying to complete all the skirmish encounters but I'm having trouble finding Nurvor and Dombor.
So far I've started 20 skirmishes without seeing them.
Most of those have been solo (mainly T1s and T2s but also one T3)
I've completed a couple of raids too.
Am I just unlucky? Is it bugged? or do Nurvor and Dombor only spawn on a certain tier and skirmish size?