For a brief update: I finished a playthrough as a Votary, dual-pistols (Thundershock, Ecca's). Nothing was too difficult and definitely PotD viable.
I am working on two right now and could solicit some advice. The first is what I think is my own creation: A Cantor (Helwalker/Troubadour). The pistols and monks abilities of course provide the punch, and the Troubadour is providing getting dual-wield reload (with Flurry and the singy-song-of-bullet-speed). I'm getting pretty darn close to sub 2.0 seconds. I think. I'll need to double check. This will absolutely be PotD capable and I can't wait to finish up my solo Veteran and pop it up a level. Unfortunately, I had to use Berath's Blessings.
The second is, as suggested a few posts up, a single pistol Ascendent/Troubadour. I'm not as far along, but the crowd control is naturally amazing, it's just the damage is a bit under.
Any suggestions beyond those barebones framework?