@taamvan:
thanks for pointing that out Baron, I was misapplying that. Seems ok balance wise but may make the offense too risky esp. against Germany. As you emphasize, the bombers are even more precious in the small economy versions you have fewer to risk and fewer to lose.
The most difficult part for a fine SBR HR is that it should not be too much bias toward the attacker, while the intercepting Fighter presence on IC should not be a complete deterrent.
Of the many SBR values suggested in the past years, I believe the Young Grasshopper provides the best incentive for both attacker and defender being part of such raid. Using “1” values only is less a deterrent than @2 (because, with IC’s AAgun it means around a low 50% odds of survival for 1 StB) or first strike @1 (because a hit forbid interceptor to retaliate).
Here is the mechanics:
Young Grasshopper HR
G40.2 SBR HR
**Bomber A0 but 1 Attack @1 per bomber group
Damage: 1D6+2
Cost 12
Fighter A1 D1
Cost 10**
It is less OP than Global SBR, but these features increase interactions.
How?
This means the first Bomber gets a single @1 while additional StBs bring nothing against interceptors but increase damage on IC.
This is also an incentive to bring Fgs escort to get more @1 against interceptors.
For defender, letting go a few StBs is a costly tactics. Adding a defense @1 per Fg increase odds to shot down at least one bomber, which means less damage on IC.
To compare break even point:
Break even point: 2 StBs A1/A0 C12 D6+2 vs 3 Fgs D1 C10
0.667 StB/Fg break even ratio with lower number of units
8 IPCs/10 IPCs = 0.8 off/def ratio
Young Grasshopper, in 1942.2 order of economy would probably gets around this 2 StBs vs 3Fgs ratio most of the time.
And .667 StBs/Fg is far better for the attacker than the two other methods previously suggested (both near or above 1.00 StB/Fg break even point).
Also, on an StBs only against Fgs scenario, there is no Interception Threshold ceiling: attacker can add an infinite number of bombers (attack remains a single @1 roll), intercepting with only a single Fighter is still reducing damage for defender. So, this method have the best incentive to make dogfight happen.
Finally, when escorting Fgs are parts of the fight at low numbers, it is easy to judge if it worths the risk to intercept. Each one on one Fg vs Fg nullify each other damage, and 1 escort above interceptor increase damage by 1.667 (10*1/6). Making Interception Threshold ceiling according to the number of escorting Fighter.
So in a case like above with 2 StBs against 3 Fgs, 1 additional escort makes (1.819 + 0.152= +1.971 IPCs damage on average) less damage than 2 full blown StBs on IC (2*2.583= 5.166 IPCs on avg).
With 2 additional escorts, it means 1 full blown StBs on IC (2.583) because if both Fg are taken down, 1 StB is clear, the last StB against the last Fg is at 1.819. Sum 2.583+ 1.819 = 4.402 IPCs on avg.
And this case still better than letting go 2 full blown StBs on IC (4.402 < 5.166).
On 2 StBs with 3 Fgs against 3 intercepting Fgs, it is clear there is no difference between intercept and no interception: escorts and interceptors nullify each other. Both situations are even, so this is the Interception Threshold ceiling. Beyond that, each additional escort over interceptor brings +1.667 IPCs damage on avg. And from a statistical POV, it is better not intercept.
Of course, if defender feels lucky, it is not an unusual situation to have less units than attacker in Axis and Allies in a given combat.
StB 1A1+xA0, D6+2 vs Fg A1 D1
2 StBs A1+A0 against 3 Fgs D1
1 StB A1 vs 1 Fg D1: + 5.486 - 3.667 = + 1.819 IPCs, 1 vs 1
1 StB A0 vs 2 Fgs D1: + 3.183 - 5.056 = - 1.873 IPCs, 1 vs 2
OR
1 StB A1 vs 2 Fgs D1: + 4.850 - 5.056 = - 0.206 IPCs, 1 vs 2
1 StB A0 vs 1 Fg D1: + 3.819 - 3.667 = + 0.152 IPC, 1 vs 1
Sum: + 8.669 - 8.723 = - 0.054 IPC damage/SBR
Net: -0.054
Break even point: 2 StBs A1/A0 C12 D6+2 vs 3 Fgs D1 C10
0.667 StB/Fg break even ratio with lower number of units
8 IPCs/10 IPCs = 0.8 off/def ratio
