Suggestions for Turn 4 Final Phase transition

[Itseotle]

Hello OP! My groups setup is pretty much same as yours (we have a DRG instead of MNK) and what we do when the Dreadnaught + Knights spawn is we have our off-tank pickup all the Knights/Soldiers and main tank will pickup Dreadnaught ofc. The BLM then burns down the Soldier. Meanwhile, the DRG uses tier1 LB on the Dreadnaught to make up the lost BLM dps and we all (except for the BLM) kill the Dreadnaught. All our ranged dps and healers stack just to the Dreadnaughts left so that way when the spiders spawn they get eatten quickly! It should die before the next one drops, and when it does the DPS burn the rook quick then go to the new Dreadnaught and we all burn that down, leaving the other 2 Knights and Soldier on our OT and we kill those last. It kinda works for us very well and if you want we have a simple kill video up you can take a look at http://www.youtube.com/watch?v=qWjBH3B1CvA#t=213

Edit: Forgot to mention! When the last Dreadnaught drops the OT will pickup the new Soldier and Knight. The MT will want to use Hollowed Ground and his cooldowns here so the healers can focus a bit more on the OT, cuz 3 adds hurts a little.