Who are you? Never seen a "supergrunt" on POT5 in my life, and I've also been there since consolidation.
Speaking as a Sorcerer healer, who is almost certainly better than you, I can say that sorcerers are awful in arenas, and I have since rolled an operative healer because I recognize that fact and want to heal viably again. A nobody's opinion on how good he is at sorcerer doesn't change that fact.
Enough nonsense about your "tricks" and inability to be shut down: pics or ****.
Proof that I can outheal you, and thus, have a more meaningful opinion than you:
http://i1104.photobucket.com/albums/h332/Razinon/image.jpg
If you don't wanna follow the link, that is 2.6K HPS in ranked arenas. On my poorly/decently geared sorcerer, of course.