Running the numbers, if you assault as follows:
SZ111: Sub, BB, 2ftr, 2tac: 72% +12.3TUV
SZ110: 2Sub, 2ftr, 2tac, 2SB: 90% +30.2TUV
You should still win both battles 64% of the time as Germany. It’s a little better with an extra SB to SZ111.
That’s still a pretty risky assault for Germany. I reckon it would work out to a 90% chance of losing at least 2 planes or even worse.
I think the wise course for Germany becomes to concentrate on one of the fleets, the SZ110 one which leaves your SZ124 sub with nothing to do unless you want to gamble on hitting SZ109. So it really does weaken Germany’s initial assault on the UK significantly. ABH has the wise move, I think.
The downside for the UK with the scramble is that they lose the entire RAF unless of course Germany retreats or gets the minority outcome. I think that’s a price worth paying. How will Germany kill USSR with such a hit G1? Makes it more difficult.