necro WvW weapon set
Staff traited with Greater Marks, Well of Suffering and Well of Corruption traited with targetable wells and Plague Form. This is the bread and butter for tagging and collecting loot bags as a necro.
Unless you are running in a small 2-5 man team as direct damage is king of the outcome. Kravick is correct, the range of the staff will be your bread & butter and Plague Form will save you as much as it will cause AoE damage. No Matter what your main hand swap out will be, warhorn should be in that swap. Range and speed is life in WvW when you have 100’s of players on both sides in mass combat. I pretty much complete my dailies in WvW and have fun doing it. You cant put a price tag on zerging with the right commander, it can be a great outing or a boring outing.