Holy Spirit question

[Dizzy_Derp]

As off tank; FoF, Fast Blade, Goring, Req, Holy Spirit spam (all whilst mixing OGCDS in), then the same again with Royal Auth instead of Req and Holy until MP returns.
As Main tank it's pretty much the same, but use it more thoughtfully to help fill my Oath gauge for upcoming busters like Stormsplitter and Pull of Light.

Edited OGCD part

Nooooooo This is terrible don't do this unless you want grey percentiles on fflogs. Never use for at pull wait until your up to boring blade to pop it. And unless there a metric fuck ton of movement when the boss is pulled it's always gonna be higher damage to start with your requiescat and holy spirit spam immediately following putting up goring because holy spirit is boosted more than weapon skills can from your party buffs. And never ever ever ever use holy for your gauge. Ever. That's dumb.

[Furious]

Nooooooo This is terrible don't do this unless you want grey percentiles on fflogs. Never use for at pull wait until your up to boring blade to pop it. And unless there a metric fuck ton of movement when the boss is pulled it's always gonna be higher damage to start with your requiescat and holy spirit spam immediately following putting up goring because holy spirit is boosted more than weapon skills can from your party buffs. And never ever ever ever use holy for your gauge. Ever. That's dumb.

It's not always going to be higher damage to start with requiescat holy spirit, it's only a dps gain if you end the fight losing a requiescat rotation. In the case that the fight length allows for it, it's potentially better to do a full FoF rotation first into requiescat. If you start with requiescat into fof, you never buff requiescat with fof. There are also considerations to be made for other buffs from other people - some buff all damage which favours a requeiscat opener, while others buff only physical damage (rdm, for example), which favours a FoF opener. There's even some magic damage buffs... nah just kidding.

You can either:
Fast savage halone (only if needed) > Fast riot goring > Requiescat > HS > FoF > Goring > RA RA > Goring... into regular rotation
Or
Fast riot (FoF) Goring > RA RA > Fast riot goring > requiescat (last 2 seconds of fight or flight) > regular rotation. Doing it this way means that your fight or flight will always line up with the second and third going after each req, and lead into the following req.

Fight length and buff status of the party will largely determine which is better overall.

[MahoSenshi]

FoF affects only physical damage, no point in using it for magical burst phase at all.
OT opener looks like GB combo->Req->HS x5->Fast->Riot->FoF->GB ->RA combo->RA combo->GB combo.

[winsock]

When should I be using Holy Spirit?

Save situational stuff, you'll use it as filler after GB depending on the state of FoF, Requiescat, and your MP.

In its most simplified form, the 'target dummy' rotation has 3 steps:
1) GB combo + RA filler (w/ FoF)
[FB, RB (FoF), GB, RA combo, RA combo]
(Note: FoF needs to be activated between RB and GB so that that the next GB will be buffed by FoF as well.)

2) GB combo + HS filler (w/ Requiescat)
[FB, RB, GB (requiescat), HS spam]
(Note: FoF buffs initial dmg of requiescat, and FoF will end after requiescat)

3) GB combo + RA filler (no buffs)
[GB combo, RA combo, RA combo]

REPEAT