d/d Ele in WvW
Celestial is king for D/D builds.
There may be times when you want to swap some celestial gear for knights or berserkers, but celestial should be your foundation. If full celestial is too expensive/taking too long/etc., then don’t feel like you are completely gimping yourself by taking a substitute though.
Prismatic Storm: Ele
Prismatic Science: Engi
Prismatic Dream: Mesmer
Prismatic Science: Engi
Prismatic Dream: Mesmer