The day I'll be out healed by a 31 pt heal sorc/sage I might agree with you. Not to mention that you are sacrificing the bubble stun by taking it.
Trust me it happens. I play on a very strong PVP server and most play bubble stun, however the few that are truly skilled and play 31 point are monsters. However it also takes the other people to know to stand in it etc..
Both good specs, but one will be nerfed soon enough and then its time to switch back lol