Heroes of the North
While the Haslanti air fleet is mostly destroyed, the ice fleet is still fully operational. These barges, if retrofitted to be capable of fighting opponents of the Crystal scale, could be a huge asset. Particularly in the deep winter. As is, their catapults and ballistae are dangerous, but ineffective against Crystal vehicles.
The air fleet itself has only a dozen surviving airships. They have little in the way of armaments, but would make good transports and scouts.
Recruiting the Haslanti remnants is more a matter of staving off despair than convincing them to go to war. They are already at war, and they are losing.