Taken from the 2.1 thread:

A quick video doing T6 normal Rift 4x wizards using Firebird's 6 piece set.



All are running this build:

http://us.battle.net/d3/en/calculato...SO!Zhgb!YcaYZc

No Illusionist for now until I get all with roughly the same toughness to add Unity rings. DPS is pretty bad with the exception of my main, but as u can see, everything melts pretty fast, including elites and the Rift Guardian. Of course, T6 is a joke now, so it's not the best reference, but still, worth testing for now. My main has a godly Furnance, #2 and #3 decent Sunkeepers and #4 a junk Sunkeeper. Jewelry sucks as well since I had to use dex/str for now.

Low difficulty is not a problem but the lack of CC will eventually be a huge issue in Greater Rifts. I'll have to figure out something once I get there.

After some testing, I figure out a way to CC without stopping much. Well, the only thing I can say is that I wasn't expecting this AT ALL. Sure Wizards can deal very good damage, but I thought I was not gonna do better than my DHs ... WRONG. I found a good way to CC and still beat the timer. Funny thing is only my main has very good gear. The other 3 wizards have pretty low DPS and kinda low toughness. The Unity idea worked pretty good. I mainly died cause of lag. Seems like 4 wizards casting Apocalypse lags me to death

Anyway, here are 2 videos showing a very simple build for 4x Wizards in Greater Rifts.



Got lucky at the end with a Conduit pylon but didn't wanna use it.



All are running this build:

http://us.battle.net/d3/en/calculator/wizard#liQNgO!Zhgd!YcYYZc

with the exception of the last wizard which uses Elemental Exposure instead of Dominance. I'm pretty sure I can push it to 40+ if I get good gear for all of them.