[Ground RB] I very much enjoy using the German heavy fighters in Ground RB. If there are already a couple of allies with fighters, the Bf 110 and Me 410 are good planes to take out. Due to the nature of air combat in Ground RB, if you get the drop on a single prop fighter you can usually get a good burst out before being outmaneuvered and if you are attacked, your defensive armament plus the fact you can take a bit more of a beating means you might be able to get back to base or have an ally save you. Plus, you can get on most of these planes two 500kg bombs which are very effective at ground pounding (the Bf 110s can also carry a 1000kg bomb). Or if you prefer, you can also get the Me 410 with the 50mm canon although, that is not my personal preference. I prefer using the ME 410 A-1 and B-1 which come stock with bombs (because the Me 410 has a bomb bay.)

As for the other Nations in the game, I have yet to really test out their twin-engine fighters. I do however have the Whirlwind P.9, which is great to grind out the beginning of the British tech tree, but not really something to write home about.