Necro's minions good or bad?
If u want condition build look it up on youtube. Minions are veryful. Try pvp and u will see.
As I do not PvP, my experiences apply to PvE only. There are some situations where minions are not ideal (usually in dungeons or Fractals where you want to specifically control where a boss goes or who it attacks), but on the whole minions are a great choice for PvE. Properly traited, they can steamroll just about anything in the open world, and let you solo a great many Champions.
I know that MM’s can be a frightening force in large numbers in WvW, although I’ve yet to see this in person. In general though, MM’s make poor choices for joining a zerg since the sheer amount of damage you encounter in zerg vs zerg combat just melts your minions like wax.