for Ifrit I can share my experience as healer. Currently I prefer WAR as tank because it has higher HP, so better buffer on damage. While actually PLD is not bad either, but PLD takes similar damage (because of elemental attack?).As someone said, if the healer(s) getting cracks on last phase, it will be serious danger on the WAR tank, this is when PLD is better on WAR coz the self sufficiency (except when they run out of MP lol)