I thought that the Ki-43 wouldn't be that good in the MA because of weak armament -- but Ki-43's are quite good. True, you won't be doing any snapshot kills in one, but the armament seems more lethal than that of a Hurri I, Spit I, or C.202. And they are so very, very nimble. I did several sorties in one yesterday for the first time, and two of them were landing 3 kills. In the mix included an F4U, P-38, and F4F, so the Ki-43 can kill sturdy planes, too. Also, although it sheds parts at very high speeds, it stays maneuverable up to that point, unlike Zeros, which get extremely sluggish at high speed.