Hideki,
My suggestion would be one of the biggest changes in the game and it could take a while to integrate it into the game. But it could make the game some much more skillful. First make the stance something u can change only every 3 turns. so if your in attack u stay in attack till 3 turns are up and u change it to defence or mana. I no what u think then how would u attack? Well then u make like 5 attacks like stab, downward slice, horizontal cut, spinning chop, and upward slice. Now that the attack are made. I can show u the coolest part. Make combos using the 5 attacks. For example the first combo can put a spell block on the enemy and the attackers combo is stab, horizontal cut, downward slice. You can do a lot with this like stun your enemy or brake through there guard. Hope you like it.