Fine-Tuning PLD rotation - tips?

[Mirateski]

I know, I know. Play WAR if I want better dps.

That aside, I'm now the mt for a static and I was wondering if I could get some help to pull better numbers. Our static is kinda made up of folks who can't really fit regular raiding into their schedule, so our group comp is a little off, but I'm curious.

Given:
- Healers have requested I stay in Shield Oath 100% of the time
- We have no NIN
- The OT is a DRK
- The BLM does not have Quelling
- We have no MCH (we have a brd)

Is ~800-900 dps acceptable? These are the numbers I've been told I'm getting.

My rotation is as follows:
open with shield lob
Fast Blade - Spirits Within
Savage Blade - Fight or Flight
Rage of Halone - Circle of Scorn
Fast Blade - Bloodbath
into goring blade, then Royal Authority combos unless GB or RoH needs refreshing (for the healers)

So far, all I can think of is to use halone less, but my HP can get distressingly low if I don't keep the debuff up on the boss. I'm saving CoS to use within FoF so I get it off twice each time, and I'm not sure if that's worth doing when the cooldown timers don't line up.

I'm using Sheltron for every Scrapline except FmF, where I use Hallowed, and otherwise rotating Rampart - Foresight - larger buff/conva where appropriate.

Any suggestions? Or am I mostly dependent on the group getting more used to the fight so the healers don't cry when I turn on SwO. We only cleared as a group for the first time last week, although I've now cleared three times.