I wanna start a necromancer, but first I want to know if I can play the class.

My idea is, that in PvE I would spam conditions and in dungeons I would spam conditions on enemies + manage the conditions of my group, removing the bad stuff from my team.
For WvWvW - well I don't go there often.
Does someone know a build for me?

Can one play a necromancer in Orr, alone?
Because the mobs there remove conditions...