To attempt a summary so far:
All agree om bringing all available weight as far back as possible.

Mainsail:
Ca 2/3 of the power is created by the leeward side.
Keeping the traveller in and not letting out the sheet will stall the main top and effectively stall the sail and reduce power.
Problems: Will slow the boat down and
Create major problems when releasing sheet for speed again.

Letting out traveller and mainsheet will allow twisting the top and depower. Maintains speed.

Making sure the mast is rotated may be a must to produce the twist needed.

Jib:
Keeping the jib in will reduce leeward flow over mainsail, but only in lower part.
Letting the jib out will help keep power on in lower part of mainsail and maybe create a little forward lift?
However, working the jib sheet may be difficult in the heat of the battle.

Tentative conclusion: use twist to depower when bearing away.

Still: what about wind strength > 25 knots
- is stalling the main an option in "survival" situations?
(when all you think about is how to get back to the beach
- and fetch the surfboard)

Stein