ORIGINAL: BBfanboy
Be aware the Japanese never get enough good AA, and the Allies are deficient for at least the first year. The Coastal AA Regiments that the US have are quite good and I think NZ and Australia have a few massive AA brigades.
Given that they are so valuable early on, try not to put your best AA units on tiny islands where they will be unlikely to survive an enemy landing. Either hold the island very strongly (Atolls cannot hold enough troops for this) or keep them on large land masses with a retreat path.
I agreed, but limited what I can do with them and wouldn't waste them on a tiny islands tho. Instead I would place them inland of Japan to protect most valuable structures. Cruisers and up would tear up those islands with heavy shelling. Wish I could add more production or focus to produce more of specific equipment.