First off, the immunity bubble only last a few seconds and only sorcs with the talent to have any bubble heel for small amounts really heal up. For most they heal MAYBE half way. A good sorc will pop their heal over times and then bubble. Any attempt to use an ability while channeling the bubble breaks it. Also, it is on a 3 minute cool down so it's only able to be used judiciously, not spammed. Second, other classes have similar abilities to more or less be immune. Jugs can pop all their abilities and basically avoid most if not all damage for an equivalent amount of time, you just don't see the bubble. Operative and Sins can go completely stealth and run away to heal. Marauders, similarly can escape the death blows with camo. Snipers can avoid CC's, pulls and being jumped to, plus they significantly reduce damage with cover and shield. It took me a long time to learn to even be viable as a sorc, and I am DPS with limited heals. Most Sorcs who don't know their class die much faster than other classes were players don't really get how to maximize their class defenses. And by the way, Stun locks are a BIGGER problem in PvP, not heals. Look, if you get a good Sorc in PvP who is playing with other good players or even better, with guildies on chat, you will have just as hard of time killing them as any other class doing the same thing. The whole, OP argument is BS.