I'm taking my time and unlocking lots of hero skills through PvP, so I haven't gotten to Master of Whispers in the nightfall storyline yet. I'm at Kodonur Crossroads, so just a mission and a few quests away.
So what I'm wondering is this: has anyone tried putting both necros in a party together as MMs? I wonder if giving both necros just Vampiric Horrors as their animate spell would allow them to eventually build up a full army each, and not both try to grab the same corpse very often. With a full army of Vamp horrors, they could easily use Order of Undeath as their elite, and be healed from the 45% sacrifice of Blood of the Master with 20 minions. They'd also need a good self heal to keep BotM going out of battle, but should easily be able to keep the whole army alive indefinitely with 2 necros casting it, as long as you stopped every 10 seconds or so to give them a chance to cast it. Bring either monk henchy along and they will keep the Necros going. Throw in Dark Bond for if they get targetted, Signet of Lost Souls for in battle healing, and a few offensive spells to help get the corpses started rolling in.
For the other hero spot, I'd think a command paragon with Go for the Eyes, Aggressive Refrain, and Focused Anger, along with a few other shouts that affect all allies (not just party members) could make for a pretty powerful group build. Hmmm, you might even give the necro's a paragon secondary and 7 command each so you can chain "Fall Back!" and counteract some to most of the minions degen while on the move.
Well, I'll give this build a shot here in a few more missions and see how it works out. 20 minions with OoU and criticals left and right should rock though.
P

whereas MoW is a Curses (I myself go blood) so theres a good diversity.