White Mage

Accession: Extends the effect of the next single target Healing or Enhancing Magic spell to party members within range. MP Cost is doubled & Does not work with existing AoE abilities. ( I realize this was technically a Scholar ability in FFXI, but I feel it's more suited for WHM in FFXIV )

Boost Any of the abilities from this spell line in FFXI.
Arise/Raisega AoE Revive
Haste
Sacrosanctity Enhances magic defense for party members within area of effect.

Some of these are probably unrealistic, but I was never told they had to be. :P