an AC in mp you should not ever assume that they will have green air, so SD is still the better doctrine for them. or alternatively for non-AC nations in mp. Out of the three trees, only strategic and operational give +10% fighter agility.įor purely land combat, where, for instance in sp, you know you will have green air and just want better land combat buffs, BS is the best. Most people seem to consider that strategic bombing is the best by far.