Gotta love the challenge!
I’ve already spoken my piece about the bomber strategy, and then some, so I won’t bore or irritate you with it now. I’ve only played against it, against a very good player, twice, and both games were decided by dice - we each took a game.
If it annoys you, just make a house rule. Limit 2 or 3 bombers purchased per turn or something. Perfectly reasonable to ask that and I doubt many will turn you down over that.
Don’t get me wrong - I still think buying that many bombers is sub-optimal, but I haven’t proven it, I will admit, as I explained above. I for one just still don’t buy that it’s unbeatable or breaks the game. However, I do think bombers are underpriced especially since the +2 damage was added. We paid 15 for them back in the day and didn’t have airbases