Since an old thread has been resurrected my take is don’t worry about it to much.
Hang BTC. After you have the technique down then follow these simple guidelines.
Move up in weight slowly. As long as you are growing keep doing what you are doing.
Once you have stopped growing and you no longer feel that deep burn in the ligs then add weight slowly until you do. If you still don’t feel that burn in the ligs and you aren’t gaining start transitioning to the upper angles.
None of the above is done quickly. You don’t add tons of weight over night. You don’t abandon the lower angles over night out of frustration.
The one exception could be for the guys with the extremely low exit point. Keep adding weight using a progression system but be prepared to transition to the higher angles sooner. Again not an over night decision.
We each have our own risk vs reward. Some people might never gain because they aren’t going to hang a weight that will get the job done. That is okay.