i dont mean the active time battle and such, i mean how you get your powers.
EXCLUDING BREAK DAM/HP LIMIT
i think it's gotta be FF8's junction simply because, as soon as you embark on the mission with the magic lamp you can get diablos without much trainin (almost no training) then with him you can begin to refine cure magic and boost your HP straight up to 5000, a couple more items and your at 9999 on disc one with almost no traingin needed.
sures theres the drawback of not using your magic so you stay strong...but with draw, just suck it right out of your opponant.