No need to post about doing 3v3 instead or 'it can't be done, reroll.'
If you were going to duel or world pvp this xpac, what specs/glyphs are you taking? I've been trying to make affliction work, even doing crazy stuff like using SacPact for the 300k+ shield, then summoning a pet right after for damage, but I just can't out damage feral/dk heals because I can't get into my full rotation. I seem never to get any drain lifes off if I spec into that with glyph. I've noticed that though destro's damage sucks and has no fel flame, however, it seems that its the only one that if you get locked from fire, you can at least cast fear. But, I haven't really tried much with it.
If you are doing well, what spec, glyphs, and general strategy are you doing against healing melees.