I've actually changed my thinking a little. It always seemed weird to me that turrets affected bombers in multiple ways, meaning that they both shoot down bombers, and subtract from the number of attacks that they get. This is different from torpedoes, and assault boats which makes it weird.
Due to this fact the number of turrets that you have becomes exponentially good the more that you have. Lets look at a wave of 6 bombers going against every turret value 1-6 on a ship with 5+ armor:
Turret number | (theoretical) Damage caused |
1 | 4.58 |
2 | 2.778 |
3 | 1.5 |
4 | .667 |
5 | .19 |
This table shows it about halving every time one turret increase is gained.
However I think that the turrets shouldn't affect bombers this way. They should be a consistent gain between turret ratings. So therefore I pose that Turrets only affect bombers by blowing them up on the way in. Then each bomber gets only D3 attack runs rather than d6.
This would make the damage caused look like this instead
Turret number | (theoretical) Damage caused |
1 | 3.667 |
2 | 3.333 |
3 | 3 |
4 | 2.667 |
5 | 2.333 |
6 | 2 |
This would fix the 'immune to bomber' problem, and keep turret values similar. It does make things with less turrets a little more resistant to bombers, and things with more turrets a little less resistant. (well a lot in the case of 5&6).
but to me it never made sense that battleships were just immune to bombers, and perhaps this value could be altered to something like a set D6-3 for bombers rather than d3. However it never really made sense to me how bombers functioned originally.
This would probably mean a reduction in the cost of the turret upgrades on ships that have that option, such as the cypra probattii