Looks like survival is at least worth trying...
....haste for faster dot ticks / regen or mastery for magic dmg?
Eventually with full gear this is going to decided by an individuals play style. If we want to examine the raw output of our stats and assume the player will be performing a rotation with the intent on maximizing his or her's DPS the stat weights will reflect Crit>Haste>Mastery.
Now let me explain the above. In terms of raw damage, crit will always be our top secondary stat. Now keeping that in mind, haste and mastery now lead to a slightly less obvious choice. For SV hunters 600 points of mastery provide about a 1.6% damage boost to our magical damage dealing shots (about 60% of our total damage). What we are left with is our pet/abilities (crows,blink strike,lynx rush) , auto shots and our level 90 talents.
400 points of haste on the other hand is equal to about a 1% boost to ALL
of our damaging abilities while also providing us a higher focus regen (4 per second being base) and speeding up our non instant damaging abilities; cobra and auto shots. (Keep in mind auto shots will be dealing a significant amount of damage in full gear)What does this mean??
Basically, in a perfect scenario haste > mastery will provide more damage. However, as we all know arena is far from the perfect scenario. I suspect mastery will be the way to roll in current gear and
as we start obtaining prideful pieces as it is much more forgiving to players not fully maximizing damage at all times during an arena match. You will not see huge results by switching to either as the % is so small in either direction but I suspect the play-style will change a bit for each.TL;DR
In a perfect scenario haste should give you more damage but mastery will be more forgiving to the unpredictability of arena.