by Thanee
Your first problem is, probably, that there is just one dwarf each in the Spirit and Lore sphere (Dwalin and Bifur). :)So you have to decide on a third hero to join the dwarves on their journey.
Of course, you could also put Dain into the Spirit/Lore deck (and leave Gloin for the Tactics/Leadership deck), considering you have the better options to keep him ready, anyways (between Unexpected Courage and the Erebor Record Keeper), that might be a pretty good idea.
Since you have Bifur for Lore, you can shift Dain's resources over to Bifur every round, you would not even need any Leadership cards in the deck to make use of them. It would essentially work like having 2 Lore heroes around.
Bye
Thanee