Minion Vampire Reaper
I have been playing around with something similar.
If you are going to go reaper, you probably want to take the new shout, Rise instead of Bone Minions.
I would then probably take Augury of Death over relentless assault.
Rise instead of shadow fiend, not bone minion. And get rid of the healing minion.
hmm, but why is Shadow Friend worse then Bone Minons?
SF attacks are slow, you get 2 minions instead of one(trait wise). SF ability is super slow, single target blind. Bone minions have huge boom boom+blast.
Almost forgot, lower cd, you can use them more often.
SF only+ is the LF generation, but its far from enough to take it.
This are my reasons.