I'd go for the E based plane with the highest energy state, which is not necessarily the one with the most alt. In a nice furball like you've described, you can set up on 3 or 4 options as you enter the fray. If my first choice evades, I conserve E by not moving aggressively to get him... move on to the next progression in my target list. Kind of like a quarterback surveying the field, the first choice may not give you what you want, but chances are that at least one of your choices will. Prepare for the assorted accusations you see people spewing at me on ch1.
"You are nothing but a cherry picker." "Pony dweeb!" "You suck Steve, you can't 1v1 at all!" Let's go to the DA, I'll kick your arse!."
Rinse and repeat