@wittmann:
Interceptors should hit on a 2 and Bombers should only do D6 or D6 halved plus 2, when doing a SBR. I believe 15 was a good price for them too.
All these points have impact on SBR and Bombers usefulness.
Rising interceptors efficiency and reducing the damage on IC/AB/NB drastically affect the statistical damage per each SBR run.
Such SBR tactics will becomes uninteressing for any optimal play.
So, instead of making Strategic Bombers more useful for what it was built (historically), it will becomes mainly as the ChrisX criticize a Bomber doing mainly combat mission, as it was an (historical kind of) tactical bomber.
On the other part, a 15 IPCs cost affects both regular combat and strategic bombing raid.
In this situation, a player will have to ponder about the cost and combat value against other units.
This will definitely outline the specific range of 6 spaces, as the main criteria which influence the decision.
There is another way to reduce the impact of StB in general combat without radically changing their combat value and cost: rise the attack value in specific circumstances but reduces the basic attack value.
STRATEGIC BOMBER
ATTACK 3 rise to 4 when no enemy’s plane (+1 attack due to Air Supremacy bonus)
DEFENSE 1
MOVE 6
COST 12
You can also add an escort bonus slightly different than the Fg-TcB bonus, more like DD bonus.
Attack rise to 4 when at least 1 Fighter is on the StBs side, acting like escort.
So, as long as there is at least 1 Fg with them, StB can get ATTACK @4.
That way, when StBs are attacking a SZ without any Fg support, then their attack value will be 3 while the defending Fg will keep their high Defense @4.
It will be only when they have Fighter escort with them, that they can rise to an even combat Attack 4 against Defense @4.
Also, don’t forget that with Fg, it costs 10 IPCs to get a defense @4 while it costs 12 IPCs (and at least 1 Fg) to reach the same @4 as attack factor.
For Damage on IC, in G40 SBR I prefer to rise Fg defense to 2 (and also escorting Fg at 2) than reducing Bombers damage to D6 and keep all planes @1.
But I would do only one change, not both.
Another change which can have radical impact is to make the AAA fire before the interceptor and escort phase (as it is in Anniversary edition rule).
(Instead of seeing AAA fire as IC’s AA gun, it would be seen as a territory’s AA gun fire.)
All AAA hits will reduce the number of attacking (StB) roll @1 and escort (Fg @2, in my HR) against interceptors defending @2 (in my HR).
Once pre-emptive AAA casualties removed, the regular combat is made.
Casualties from both sides are removed.
Then damage on IC followed.
With such a change to AAA phase, there is no need to change cost or D6+2 damage.
One last point on Strategic bombers compared to Tactical.
The actual sculpts of Germany and Japan showed Medium bombers.
As far as I understand, these twin-engine bombers were able to do some tactical raids as their smaller brothers (such as US SBD-Dauntless, tactical dive-bomber, or UK’s De Havilland Mosquito).
So, OOB Strategic Bomber is not only made of High Altitude Heavy Bombers (such as B-17 Flying Fortress).
That’s why, it still make sense in game perspective that StBs performs some kind of tactical regular combat.