Best Vanilla Mesmer Build for sPvP
Your best bet is going to be a PU shatter such as this: http://gw2skills.net/editor/?vhAQNAR8flknhy0YNawRNwtGLnGk5O22MIDwCWe5Iae4A-TpBFABCcBAEvMQN7P02BBYhjAAAPAAA
That being said, I wouldn’t classify any vanilla mesmer build as being actually competitive in PvP. That option is simply the best of a lot of bad choices.
Before builds come rolls. Though vanilla mesmer is limited in choices -_-u