Also, this is ALOT of fluff to have around a 'Holy' spell...this spell is quite literally supposed to be the WHM's version of O CRAP!. If a WHM is willingly throwing out all their mp to save themselves, there won't be time for all the extra stuff....

If instead you are going for a 'toy' or 'lol!' effect, you probably don't need the SS/Regen anyway... this would be the order for that

Shroud of Saints
Presence of Mind
Holy
Blistful Mind (for mp it should have been charged earlier)
wait maybe like 2
Holy