I think the main focus for brewmaster should be on stagger. So, I would love to see a tier set focused on interacting on stagger.
2pc - You have a x% chance for every stagger you purify to cast special delivery. Special delivery reduces the cooldown on your brews by y seconds.
4pc - The ale in your special delivery is infused with your chi. Targets hit by special delivery are soaked in chi ale. When you purify stagger it causes targets who are burning from breath of fire to flare up refreshing the duration and increasing its damage by z%.