I'm guessing you'd want the glyphs of
Dispersion and
Inner Fire to maximize survivability. Aside from those, there's plenty of interesting stuff around for the third one, I guess.
Glyph of Fade might be a good choice if you have problems with melee classes but
Glyph of Fear Ward might be better if you face a lot of warlocks. If you find that survivability isn't your main problem in PvP (in which case I guess you mostly do BG's) you might want to look into things like the glyphs of
Shadow Word: Pain or
Shadow.