I have to disagree on what Tibian says.

I think CON are fineas it is now except your probably right about the emity issue that prevent them from spare any heal into group instead of GLA alone.

from what I see in your post is that you are going to make playing a mage, much much easier than the currently is. So you says you lazy to cast buff multiple time during boss fight?, and that it is hard to group people for AoE during that? so you ask SE to make it that u can just do it before fight so that you don't have to worry it on fight?. I think part of the fun of fight is how to manage this. No matter how much people in your group spread out from Ifrit WS, you still need to look for chance to buff them.