Warrior Tanking

[JonBigwood]

[*]The only time you'd want to use Flash is to start the pull in situations where mobs are too spread out for Overpower and you want to spend the Infuriate/ Wrath stacks on something other than Steel Cyclone, such as Inner Beast or Unchained. I find these situations to be rare, but WP Speed Runs and Turn 4 are such examples where you want that Inner Beast for the damage reduction instead of using Steel Cyclone.

In Titan HM, I suppose you don't repeat it much :-), if you flash before each Mountain Buster, you may dodge 2, 3 or more if the fight lasts long enough (it does last if you kill him.) This makes a difference.
One thing you are not taking into account is that flash has the blind effect that against some mobs makes it much more likely that you dodge the attacks. It is not just to gain enmity, although we normally use it for that. I think most of us (PLD included) use flash less than it would be ideal, we forget about it except when it is very clear we need it (PLD don't have Overpower so Flash is much more needed.) I am leveling Marauder and I love Overpower a lot.