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In the past, I've always just sheeted in as far as I could and pointed as high as the conditions would allow. The boat always felt constrained and held back
Yes, bearing off for speed and then coming back up as far as possible is the trick. You can not point high sheeted tight and pinching. You have to have some boat speed. Otherwise the boat crabs sideways more. Plus the sheeting is likely stalling the boat speed.
Tell tails in the upper third of the sail really help to tune the sheeting. It is easy to over sheet. You need to pay attention to the air flow in that area. Tails at the leach should flow aft and hook behind the sail alternately.