I would not think too much about defense if you have adequate search aircraft in the correct places along with a reserve of Betts/Nells and Zeros. He will not have the ships in the correct places, enough units to attack while trying to set up defensive bastions and a definitive shortage of aircraft carriers. Except for the Dauntless and the toughness of allied Wildcats, P-40s, and Hurricanes, your comparable aircraft are better with a longer range. You can control production, he can not. You have highly skilled pilots, he does not. He has to react to you, do not lay back with anything the first few turns. Until he concentrates his aircraft carriers, he will not have to capability to overwhelm your air defenses that you can quickly bring to bear, not to mention being able to attack his fleets from a farther away than he can attack you.
Once your invasions have captured airfields and you have repaired the damage, you can and should have the KB go "dark" which will leave him wondering where you will strike next.
Seek peace but keep your gun handy.
I'm not a complete idiot, some parts are missing!
“Illegitemus non carborundum est (“Don’t let the bastards grind you down”).”
― Julia Child