That said . . . I'll probably just limit it to the two wings I have now (4 wings does seem a bit much). However, consider this issue:
From what I can research, the war in the Pacific was an island war which meant that often any CAS was provided by CAGs. I agree, they didn't use the coordinated CAS like Germany and the US (I'm thinking North Africa for US and, of course, Normandy, etc.). CAGs can be a great source of air support you're fighting on islands or if you park your carriers next to the shore. But they're not going to reach into the Iraq, Persia, Turkey regions, or reach deep into mainland US. So at that point, I'd have to switch to TACs, because by that late date, developing a new doctrine would be foolish.
Edit: I found a website that indicated the Japanese built over 2000 Mitsubishi Ki-51s as ground attack aircraft during the war. I don't know how accurate that number is or how that type of aircraft is represented in-game.
Thanks for the comments.