As far as ideas Kiir really wants to try to find Arryn's corpse or avenge him. Don't think we can do that without Keryn, so . . . .
1. Kiir has discovered a new path to a waterfall behind the ruins in the Southern woods occupied by the cultists. He believes this new path may lead to a cultist base similar to the cave they just scouted near Daggerford. Given the number of cultists Kiir has seen in both areas, and their absence from the roads surrounding those areas, Kiir suspects there may be some kind of magic portal linking the two (or more) cultist base camps. Lt. Silverblade in Daggerford was asking about such a portal which corroborated his suspicion. Anyway, Kiir wants to put together a force to raid the South woods again, follow the new waterfall path and kill all the cultists they find. KTHXBYE

2. Go with Bran and Keryn's idea, whatever it may be.