Strongest 2 player + 6 hero general purpose build?

I believe 1 player + 7 hero is "solved" with heroic refrain mesmerway sitting comfortably at the top.

But, what about 2 player + 6 heroes?

Any profession allowed, general purpose gameplay, no cons, no heavy microing of heroes.

Full try hard, no points for fun.

The obvious HR + melee (maybe shadow theft for easier balling) comes to mind but I was wondering if someone had thought of this.