I dun exactly get what ya mean though I assume what you mean is there would be 3 different bars hp, defence and attack. That you can decrease them each time (opponent)?
But yea I have an idea of what kinds of moves the mane 6 would have.
Rainbow dash would do large damage to health lol
Fluttershy can heal own hp, she also would have ability to summon animals to attack and when she is assertive her attacks increase.
Pinkie pies attacks would be quite random sometimes very strong sometimes not so much but by using certain combos increase effectiveness.
Rarity would affect defence by using her charm.
Apple jack would be similar ish to rainbow dash I think I dunno but with some differences