I'm doing Rogues with 2 roles:
MM/Bard/Ranger - For Rifting, Questing and PVP. Only 8 in bard (healz), 0 in Ranger (pet), the rest in MM. Spam Fan Out most of the time in PvP, and Cadence when something is in range.

Bard/Riftblade/Ranger - For Instance. 8 in Riftblade for enhancing Cadence, 0 in Ranger, the rest in Bard. Just Cadence everything, using either single target or AE finisher, and prosper.

I tried Pyro/Dominator/Elementalist, but they have no way to heal themselves, they can't burn down a single elite before it kills one of them, no snares at this level and their root breaks instantly. I couldn't take out a Major Rift by myself so I think I'll respec them and try agan later I hear Mos has the Mage solution.