I lean towards the B-24. Useful both in TOD and PAC setups, sort of redundant in the MA but seems to have a lot of fans.
Really excited to see what the Ki.84 does to a/c usage in the MA. It's numbers will be huge in the first tour as everybody gives it a try, but after a few tours I bet it will have cut the number of N1Ks and LA-7s in half, with Spits and 51s about the same as before.