No, you cannot be a Minion Master with anything other than a Necro primary. You'll be missing 4 ranks of death magic, and that means you'll be limited to 8 minions instead of 10; your minions will each do less damage and have less armor than a real necromancer's minions (spawning power will counteract the lower life at least); and your minion healing spell will heal for noticeably less. There's simply nothing a Rt/N can do to make up for these shortcomings. Rt/N "minion masters" are just plain inferior.
It used to be that a Rt/N with explosive growth was on par with a N/X as a Minion Bomber. But, since Dwayna's Sorrow, and the update that made the hero AI use Dwayna's Sorrow on minions, it's a lot harder to say that anything really competes with N/Mo for minion bombing anymore.
----
Quote:
Originally Posted by Shadowmere
I am thinking that since ritualists can't produce as high level minions but the minions it does produce have much more health than their necro counterparts they would make a great "minion wall".
The armor gap is so big that they have less overall survivability despite the higher health.