Void can throw a flurry of grenades that track and disable the enemies grenades and abilities leaving them pretty much stationary. Arc and solar will have no means of defence after that. Then Titans bubbles are popped in the open field meaning that they actually have a base. Then they can get gravity bowed down/ nova bombed at a distance to finish them off. Solar is good but it wouldn't compare. Titan would have to get too close. Golden gun would be pretty useful for this but one suppression grenade and it's finished. Same for sunsinger. Although that radiance with grenades would be deadly also. Arc has storm caller which will probably not last on a 2v1 let alone the battlefield, fist of havoc yeah, but they'd have to get too close for that too happen. Blade dancer is the same as storm caller in this category