I am following the same default build from https://metabattle.com/wiki/Build:Firebrand_-_Support_Firebrand but with renewed focus instead of mantra of liberation, and monk's focus instead of altruistic healing. I still can't decide which traitline is more useful. Overall, Valor seems to complement well with the meditation utility skills and the low cd heal skills but I am not sure if the benefits from the Virtues traitline - especially the tome cd reduction - makes it better than Valor.
Which traitline do you prefer in WvW ? I am new to firebrand and do not run with an organized group if that helps.