Add elemental reaction to the game , as we know tai is strong mastery and much elements cant do much about it , so this is way ,how to help them . Every element will aply on target when they hit Them , Like you are water user , so they will aply by wet effect and someone with lighting came there and hit hiim , so he will slowed/stunned .
Ideas of some reactions :
water/light = slow
fire /wind = burn bonus
med/water = poison bonus
water/fire = dmg bonus