I attempted something last night and it seemed to work, this in no way possible will close the gap between a PLD and a WAR by much, but it does give you 6-11 seconds of breathing space. A WAR has 1 skill that is pretty much disregarded by most, that is "Holmgang" -Binds user and target in place for 6 seconds. They also have a stun that lasts for 5 seconds; Brutal Swing.

Now, lets say the Warrior was in a tough spot where his HP has dropped significantly and it will take a decent amount of time to bring him back, or we can also say that your healer is running low on MP, either way, you're basically in a shitty situation. Assuming the monster you're fighting is susceptible to stuns, you can use Brutal Swing to stun him, quickly run behind and cast Holmgang when your stun is about to run out. This pretty much gives you 6-11 seconds of NOT being attacked, UNLESS the monster uses AoEs around him, in which case, you should be prepared by knowing the fight.

I'd like to say again that this in no way closes the gap between PLD and WAR CDs, but it is a great way to give some breathing space to you, you're healer and you're party.

Just my two cents, would appreciate some feedback from those who have done Coils and know the fights.