An Envelope

At this kind of time, she wished that she would have ability like Jean where she could separate herself into hundreds of avatars and settle all of this at the same time.

She could create an avatar. 

But doing so would take away some of her energy. 

She is unlike those people with almost an unlimited reserve of energy in her body that she could uses haphazardly.

She still had to ration and conserve her energy

Splitting herself like that not only would split her attention, it would also split her strength.

She could not create thing from nothing. The energy of the avatar had to be taken from the original. The original lose some of energy

This is usually not a big deal. Since the original body could absorb more energies.

But, there is this limit of how many avatars she could split from her original core of energy. Unless she possesses certain methods, it would be a disadvantageous action for her.