For bounties I've been using these:

http://www.d3planner.com/668922290
http://www.d3planner.com/685387042

Pretty fast and no dsyncs. Ignore Pain is on demand since it relies on ORotZ to be up and sometimes there's no density. Last barb uses WW Hurricane with Stongarms.

For this bonus weekend, it's a LOT faster to just use your highest DPS barb and do T7 with it, leave the other 3 in town. Have it with max speed (Boon of the hoarder, Wreath of Lightning, Warzechian bracers, etc) and do everything "solo" but the act boss. U will dsync a little on the boss but T7 will die almost instantly. U get quite a few more caches per hour this way.