Yes, that one. It’s the version 2 of the Internal Alchemy Series.
Same, as said before. The ideal average based also on other members’ usage is 1 to 3 times. Even 1 round is powerful enough.
Saw that @Soul_Celestial already answered in the other thread. It would be good for you to follow their advice and research those concepts to see what each one stands for. That would make more sense for yourself.