This strategy is super easy with 3 Titans. 2 Blessing bubbles placed in the front of the 2 teleport zones (far enough forward that the relic can avoid splash from Templar by taking a few steps towards the back of the bubble, far enough back that it provides plenty of cover from adds, all while allowing them to stand in the teleport zone without having to pay too much attention to it). Third bubble should be Weapons just below the top of the stairs in front of the central Conflux location. This way, the Weapons bubble doesn't block line of fire. Relic just runs between the two Blessing bubbles, not having to worry about much other than teleports, and the other 5 can Sleeper and Ghorn to victory. Don't forget that Tether (I recommend Black Hole, for duration) and Viking Funeral (Sunbreakers + Solar Nades are the go-to) increase DPS for the whole team.