Plexxx
Return of the G
Play with people you know
Don't try to funnel the enemy
Headshot Snipe the Knights
Don't save anyone that you can't save easily
Take out the thralls asap
Split up so he can keep changing direction
That's all I can think of it took me an hour
I tried for 2 hours last night and we couldn't do it. One time we got really close then when one guy was the last one standing he moved backwards off the edge of the map and died