It's not that hard really. One relic holder goes down, everyone else stays up. Relic holder kills everything, supers templar, hides, rinse and repeat. Those up top let relic holder know of the templar's new location. Bladedancer works really well for the relic holder, he can hide and sneak up on harpies, and invis to avoid templar aggro when positioning for super. Everyone else throws rockets and snipes.