Are Holy Spirit and Holy Circle Pointless...

[Seraphor]

Confiteor cancels your requiscat immediatly upon using it, so in order to maximise your req windows you need to use 4 holy spells then confiteor, as that will bottom your mana and get the full effect of the req potency buffs

Now, I barely play PLD so correct me if I'm wrong... but the potency buff of Req is only active while you have 80% MP or more anyway, so only your first two spells feel the effect.
So surely using just one Holy spell, then Confiteor, would be a DPS gain even with dropping Req, so long as you're not forced to move?

Holy Spirit: 350 +175
Holy Spirit: 350 +175
Holy Spirit: 350
Holy Spirit: 350
Confiteor: 800

vs.

Holy Spirit: 350 +175
Confiteor: 800 +400
Holy Spirit: 350
Holy Spirit: 350
Holy Spirit: 350

It's just those last 3 Holy's aren't instant anymore.

[Casualty]

Now, I barely play PLD so correct me if I'm wrong... but the potency buff of Req is only active while you have 80% MP or more anyway, so only your first two spells feel the effect.
So surely using just one Holy spell, then Confiteor, would be a DPS gain even with dropping Req, so long as you're not forced to move?

Holy Spirit: 350 +175
Holy Spirit: 350 +175
Holy Spirit: 350
Holy Spirit: 350
Confiteor: 800

vs.

Holy Spirit: 350 +175
Confiteor: 800 +400
Holy Spirit: 350
Holy Spirit: 350
Holy Spirit: 350

It's just those last 3 Holy's aren't instant anymore.

The buff only activates if you meet the MP requirements, but once it's up, it's up for the entire duration.

[Ultimatecalibur]

Now, I barely play PLD so correct me if I'm wrong... but the potency buff of Req is only active while you have 80% MP or more anyway, so only your first two spells feel the effect.
So surely using just one Holy spell, then Confiteor, would be a DPS gain even with dropping Req, so long as you're not forced to move?

Requiescat checks you current MP when used. If you have 8k to 10k at the time of use, it gives you a 12 sec buff that increase Attack Magic and Healing Magic potency by 50%, makes spell cast times instant for the duration and allows Confiteor to be cast. The Buff doesn't care about your MP; only Requiescat (which grants the buff if you have enough MP) does.

Holy Spirit: 350 +175
Holy Spirit: 350 +175
Holy Spirit: 350
Holy Spirit: 350
Confiteor: 800

The actual potencies for this burst are:

Holy Spirit: 350 +175
Holy Spirit: 350 +175
Holy Spirit: 350 +175
Holy Spirit: 350 +175
Confiteor: 800 +400

With all Holy Spirits being instant cast.