Enmity problems as a PLD.

[DxWings]

Hmm...in that ilvl range you really shouldn't be losing too much in terms of aggro.
To start off a boss pull, this is what I do:
FoF -> Shield Lob -> Spirits (weaved) -> Rage of Halone -> CoS (weaved) -> Fast Blade -> Savage Blade -> Rage of Halone
That raw RoH after Spirits Within allows you to get a head start on enmity as your DPS is starting out their rotation (the start of most DPS, if not all, rotation is low in potency, so aggro is generated slowly on the start of their rotation).
And this is without being specced in STR gears/bonus points.
And yes, like others have stated, Flash has very little use in enmity generation on single target. You'll be better off with the RoH combo.
The only times you'll come close to losing enmity or even lose it for a sec is when a current-geared BRD has all of their cooldowns up and they pop them all without Quelling Strikes. They'll easily overtake you in aggro, if that is the case. However, since its a boss fight don't panic and try to voke immediately but throw Cover on the person who pulled ahead in hate (in this scenario, would be the BRD), and take that time to build up a combo'd RoH. Once you have that combo'd RoH, voke the target and immediately use that combo'd RoH.