Make sure everyone has maxed agility, then sprint like crazy. The people to reach the lamp first turn around to shoot the thralls chasing the guys in the rear. The guys in the rear absolutely must keep running. If they stop to shoot they could easily die - trust your front runners to kill the ones chasing. The second everyone hits zero weight of darkness take off again. Primaries with Firefly are invaluable in this part (Fatebringer is my favorite, while a friend of mine prefers a Badger scout rifle with Firefly). Don't be afraid to use heavies and grenades to help your team out, just don't blow yourself up. Waiting to revive someone can be very tough to come back from, though not impossible with a good team. We will sometimes leave a person behind if they go down and it isn't convenient to revive them (not to be mean - everyone understands in our teams, so it's no big deal). When you get to the last light it is good to have someone who is good with a sniper rifle get on top of a rock where the thralls/knights can't hit him and deal with the ogres. You must jump up on the rock quickly before weight of darkness takes effect again. One decent sniper can take care of them singlehandedly while also helping eliminate mobs chasing teammates on the ground. It is important to keep the ogres staggered so that they don't shoot you. My favorite rock to do this from is on the far left if facing away from the bridge. I can hit the ogres over a rock before they can even shoot at me. A handful of shots each and try are down. Once the bridge forms everyone can run across, ignoring/jumping over all other enemies, including the ogre on the other side if he spawns (weight of darkness is gone at this point). It is worth noting that you do not have to stay in the circle to continue forming the bridge, and only one person actually has to reach the light at the end of the tunnel on the other side of the bridge. EDIT: Fixed misspelled word.