first off the Rooks don't coordinate with each other and i've been trying to learn each plane within the game. but its hard!
Coordinating (read:
hording) is more easily achieved when your country isn't outnumbered 2 to 1 by both nits and bishies. Keep tabs on how "coordinated" a country gets once it loses numerical advantage.
And yes, learning each plane is hard. Most people stick to a few go-to rides that give them the best chance of success. <S> for trying them all.