OK so last two posts are basically, "I'm not trying to be condescending, just have more skill," and "you're not at a disadvantage, just don't be attacked."

There isn't enough skill to overcome an attack with the abilities given to a BLM in PvP. Your choices are run away and scathe, run around and get saved by a teammate while using scathe, or go toe to toe and die unless you have multiple skills up and even then it's a crapshoot. How does skill overcome being attacked with the tools available to BLM?

-Scathe is weak damage, the only spell you will get off most the time(and it's like a melee attack, it can fail if the attacker is circling you)
-Manawall is 2 shadows, that will buy you one GCD, 45 second recast
-Aetheric Burst is a useful slow and damage against a melee, but every dps has multiple OGCD abilities that can keep you from casting, plus simply running behind during a cast is always an option, 150 second recast
-Equanimity can keep physical damage from interrupting, but again you can still simply run behind the BLM, 180 second recast
-Nightwing is a nice instant sleep, only delaying the inevitable. The problem with sleep is that they wake up after one attack or Purify, 180 second recast
-Swift Cast is great for a 2nd sleep if they use purify, but still only a stall tactic, 60 second recast
-Lethargy is another stall tactic, one of the best skills for BLM, 30 second recast

A stun or fluid aura would be infinitely more useful