I'm really liking Glyph of Mind Blast for PvP with Clarity of Power - I only wish Crit was a good PvP stat
I haven't tried Glyph of Silence yet, it's been like a decade of 5s/45s Silence - I'm scared of 3s silence, even if it is every 20s!
Speaking of Tauren Mill, I run Bender+ToF+Cascade+CoP - and the damage we can do in a situation like that is pretty incredible - I was 50% above the next highest DPS on either team in both my last games. The biggest factor to that BG though seems to be Death Gripping enemies over and bursting - and CoP / ToF / Death does that VERY well