Dont know if you already plan to implent this, but imo beside life and mana, stamina is important.
Becasue for special fighting moves I think stamina should be usedand the same here like in my mana post with 100% and u use a part of it for a move the more expirienced in it the less stamina percent to use.
Only for moves with magical damage you should need to use mana too.
Another part where it could be used is for sprinting and jumpeing.