I started a new dwarven campaign christmas eve, and I'm currently at turn 90. It's going good, Balin has occupied Gundabad and parts of old Angmar. One thing I'm missing tho is an AoR unit for Ered Luin. Its really hard around turn 70/80 to fight Gundabad without the proffesional units of Erebor, Iron Guard and Erebor Axemen. Thorins Halls and Kibil Dum are to small to create these units the first 150 turns, even if pop growth is OK. A low tier AoR should really spice things up, and Gimli wouldnt get stuck around Pitkäranta. I had an idea about this unit also:
Wandering Smiths from Ered Luin.
A lighter version of Iron Guard, available from the beginning in Kibil Dum and large town Thorins halls. These would be the dwarves who before the battle of five armies wandered ME in search for money/work. When they heard of the return of the king under the mountain, they hurried back to Ered Luin, to pick up arms in eventual wars against Sauron and the minions of evil that lurk in the Misty Mountains.