Italy Air

Italian aircraft especially low rank is actually quite simple and easy. They are the only nation except japan (in fact japan got this idea from italy) in where they utilize HE _HE-I or HE- F) ammo in calibers of .50 caliber. TLDR the .50s have a good edge, and you get them right out the box at the reserve level. Yeah bombers in the early ranks defensively are a bit meh. but if are just looking to grind out the tree I think you will find the fighter lines more than capable.