Im running with this build in wvw:
http://en.gw2skills.net/editor/?fcAQFAUl0piYnpSyF17IyIFk2EGSh9JYfeIXtFEC-jkxAYLAyCQ2rIasVyioxqtx0vER1SBExYA-w
This is my take on power/grenade/tank build
I decided to go with power because it is easy to remove a condition if the enemy is in a well organized zerg. Feel free to comment or suggest for improvement.
Thank you and see you in wvw. :P