Heavy weather sailing
I may be bad advice, but it''s in all the sailing books: Chapman, Sailing Handbook, etc. Twist the sails to spill air off the leech and reduce heel.
It seems to me that this bit of wisdom is intended as a *temporary* measure to depower a sail. Once you have the sails properly shortened and the boat back in balance, then you can blade out, tighten up, all that stuff.