Energy Storage or Fast Casting?

I'm going to make an ele/mesmer or mesmer/ele. Do I want more enrgy to use or faster casting. I'm going to use fire spells and either domination or illusion spells. Or inspiration spells. I still haven't decided.

Which way should I go - ele/mes or mes/ele? Thanks!

E/Me - More energy is always useful, especially with the expensive fire spells. Also it is much easier to get a group should you need to PUG.

I do agree with Warrior of the Toon that E/Me probably is the better choice.
More energy is always better for fire ele.
That is, in PvE.
In PvP, fast cast means less chance on interrupt.
And, given you have the energy, more casts in the same time.
And with the right Inspiration skills, you won't have too many problems with energy.

It also depends on the main kind of spells you are planning to use.
If it's fire with one or two dom/illusions, go E/Me.
If you are going to run mostly mesmer, go Me/E.
Reason: Runes and inherited armor bonus.