Mastery Versa Crit/Haste Multi imo
Mastery is #1 no doubt. Best damage stat, no 50% nerf in pvp like crit/multi.
Versa is like mastery (guaranteed damage with all spells) and due to the crit/multi nerfs in pvp even numerically second best.
Crit and Multi are halfed in pvp, haste is 'bad' for starfall afaik. So all are 'bad' in their own way. I'd pick crit for the procs and burst.