New here, but not to multiboxing. Here are my D3 setups :)

[Cmoidudu]

I see that Devile reached GR 44 with his 4x Condemn Crusader team, I'll try to get there

Since this was the 2x experience week, so I'm mostly chaining 1-2 T6 rifts to stack yellow pool bonus, followed by a couple of GR 35-37 for the XP and then repeat. I didn't focus on breaking records, however I still went from GR 36 (achieved with my DH team) to... 37 38 39 40 and 41 with the 3x Crusaders + 1x zDPS WD.

I'm still working on the zDPS dude with some changes, like he now has 4p bonus of Asheara, which means that the 3 followers are almost always on, with some nice damage and incapacitating abilities. Also I'm not using a shield but a Thing of the Deep mojo for the 20' radius so i'm sure to pick every health globe, Nephalem buff and elite purple ball without effort.

http://eu.battle.net/d3/en/profile/E.../hero/48211560

Crusader #2 is using Shield Glare ability, and has a Cord of the Sherma belt, combined with Promise of Glory bracers, and with the 20'+ pickup of the WD i'm sure to have 3 stacks of Nephalem Glory 100% of the time, which nobody cares about, but it's a very under-rated feature IMHO.

http://eu.battle.net/d3/en/profile/L.../hero/39084501

Also my WD wears 3x Blackthorne for the 4p immunity bonus, which means that the team will only suffer 75% of ground effects (they all wear Unity rings) when that occurs. I tried to gear all followers with Unity, but it doesn't work (as confirmed in the Diablo forums).

One more thing, with this setup, Cold Snap is unable to freeze the team, not sure why. He still casts the frozen balls, but when they explode I'm not paralyzed (they still do a lot of damage tho).