Anyone found some math on the trade-offs of secondary stats in shadow arenas?
Haste - probably the highest DPS gain by a good margin
Crit - probably the best burst stat (Halo, Mind Blast, Devouring Plague initial hit, Shadow Word: Death - all benefit the most from crit)
Mastery - probably the best mana and Divine Insight / From Darkness stat
Obviously high pressure is important, but from my arena experiences in the mop beta and so far this week - I seem to run OOM after a few minutes after which my contribution to the team drops dramatically. It does feel worse than on the beta, and I suspect this is because I don't have 4 piece yet, so my VTs are getting dispelled more often than they probably will - but currently I go OOM like 2-3 minutes in. The problem is we lost Archangel, Masochism, Replenishment, Spirit Tap - and even with all of those we'd go OOM pretty fast pre-5.0 - now we just have VT ticks, Dispersion, and Shadowfiend/Mindbender - of which VT ticks account for ~2/3rds of our mana return, and are dispellable - and if you sit on the spriest - tricky to keep good uptime on.
I don't really feel like my damage is a problem, but crit would help me score kills or get cooldowns more often - and Mastery would help my mana problem - so I'm almost debating here between the weaker of the two stats. Plus, my first buy is the conquest pvp trinket which you only have a choice of crit, mastery or spirit - so I'll need to choose one of them regardless for that.
Haste would help my VTs tick faster, resulting in more mana, but Mastery would result in more ticks - so I'm not quite sure which to emphasize yet.