I hold the controller with my left hand and put my right index finger on the square button. I then make my right arm very tense, which causes it to shake. When positioned correctly, I start pressing the square button insanely fast. It starts to become sore after a while, which leads to my next strategy.

I take the turbo controller, which I bought sometimes during like my second playthrough of this game, I set the turbo mode to holding down the square button, and I then hold down the square button until it tells me not to. Yep, I've gotten Quezacotl up to like 230 before. But alas, my turbo controller is out of commission and I must use to first strategy (or not summon GFs).

The only thing this really did for me was sharpen my reaction skills a little.