on P1 and P4, if WAR spamming OverPower, there is no way in HELL PLD can catch up in aggro w/ flash.., might as well stop flashing and start killing spider. lol. (BTW my group has BRD play Army Peon for these phase as we have BRD and DRG)
you only need 1 tank to tank those spider anyway, this will free up 1 healer to dps for a bit.