A few days ago I (Sym mostly onetrick) played with a Torb one-trick on Lunar Colony.
Our team just rushed through the main chokepoint into the enemy and got killed. The Torb and I went into the little chokepoint on the right and I ported Torb Turret+Sym Turrets straight on the point. Molten Core + a few good Orbs and we got a Teamkill + Point.
So: If you find a Torb that works with you you can get out of Elo-Hell. (Plat and below) But that stragey will be removed in a few days with Torbs rework.