i think the mistlands could benefit from having a single additional fodder type seeker.
something that could add more back to the mistlands without increasing the number of the gjall or seeker soldiers.

something more easily avoided but numerous. that may call in a more powerfull seeker as backup if not killed quickly or silently (easier to farm for a solo)

and gjall nests that limit the areas populated by them but allow for higher difficulty (can give solo's space to move). to try to better suit everyone without detracting from the endgame content for teams