When they are slowed, they will be hit by any of the abilities.. Bone Spirit may be slow, but keep in mind that they have to keep the spirits in mind too.. They have to constantly keep distance from them, and that means they wont have 100% focus on the Necromancer.. They will also have to dodge all the prisons and walls he put up, which reduces focus even more.. He'll also constantly attack them.. They will be the ones on the run, while the Necromancer will be the hunter..