I see SMN being the most likely of jobs to receive this, plus they would be the most likely to AoE the spell as well and buff the entire party. I don't think SMN would be able to AoE it, just think it would be the most likely.

Next more deserving are RDM, then SCH.

I could see a PLD using it, but I don't think they will get it.

I love WHM, and it traditionally would get it in any game no matter how you look at it, but atm WHM is extremely over powered, possibly the most over powered job in the game, so I don't see WHM getting it. I won't refuse it, but I think other jobs fall into the same categories and if WHM can get it as well then splendid.

This is all based on if SE is actually able to add the spell and make it work, of course.