As someone who does OT this often, it's really a lot simpler than people make it out to be. You only need to grab the spiders if the PLD tanking is undergeared, but if you do all it takes is a little communication. Have the healers stack away from the Dreads, grab the K/S when they spawn, run to the healers, and Steel Cyclone. You don't even need to spam OP, the best method I've found is to only do the one SC, then while you're pulling the mobs away pop Vengeance and Bloodbath (Berserk if you want) -> Infuriate -> SC again. You can also do drive-by Flashes and OPs to maintain hate until the first Dread is dead.
