Mist?

I use mist to kill strong enemies
and I know that I can summon guardians or what they call them in X II by using the Mist.
Can I depend on Mist for the rest of the game or will it be useless?

PS: I'm in the very beginning - Balthier and Fran has just joined me and Fran has a Strong Mist.

actually.

all ranks of mist are equal depending on Rank (first mist will have the same power as another first mist of another character).

and from what I have heard. yes you can rely :(

We call them Mist Quickenings or just Quickenings usually. Because Espers use Mist too.

Aye, in the beginning they help a lot. Try chaining them too!