If someone wants to try a stupidly easy and safe 4x wizard build, try this:
http://us.battle.net/d3/en/calculato...YO!dWRS!cYZccZ
With enough toughness, u can even do T6. If u dont have high dps, it will be very slow, but completely doable. It's a stunlock build and because of the Illusionist passive u can spam bubbles all over the place. If u roundrobin blackhole and Frost Nova, u can keep everything frozen/stunned, even elites. I usually have Blackhole in roundrobin with 2 groups, each with 2 runes (Supermassive + Even horizon or Spellsteal). Paired with Strongarms, its a very strong combo. Also roundroubin of Frost Nova for 33% debuff + 10% of cold blooded. Not to mention your Duplicates also spam Black Holes and Frost Novas (tho they don't add the debuff effects, just CC).
Its just a matter of playing with passives for more damage/survivability and some skills. No need for someone to tank when u have everything stunned frozen :D This with a nice Tal's set and u can clear everything safe and fast. Add a Thunderfury with Fire Damage and Frozen Armor to proc the 20% debuff from Elemental Exposure + all 4 meteor types from Tal's set will rain from the sky.
Keep in mind FPS can be an issue if u don't have decent hardware.