Have parry, in addition to its regular effects, reduce the cooldowns (or extend duration I guess) of defensive abilities . Alternatively, more abilities and traits that rely on you or a party member parrying (your shield swipe activates/resets cooldown when a party member parries, next overpower costs less TP on parry, chance to gain wrath on parry, etc). I'm not a big fan of making parry into just a counterattack stat or whatever since I'd like for mitigation stats to actually exist in this game, but I could see it happening.