Resto druid pvp stats

Is there a certain point at which it becomes better to stack mastery over haste? Like after 25% haste or so? Just curious what is most optimal.

optimally every single piece of gear should have haste and versi

versi gems/enchants

From what I’ve read these are actual haste breakpoints that will reduce your GCD.
11% haste = 1.3 seconds GCD
21% haste = 1.2 seconds GCD
31% haste = 1.1 second GCD