At last but not least a new suggestion :

The cherry on the cake would be making DPS in the list sorteable...

This way an Augmentation evoker that is used to his mates could place the "best" possible targets on top of the others, an dplace the other DPS at the bottom "in case of" none of the "good target" are at range or so.

This could be done by adding little UP/DOWN arrow on the left of the unitframes that could only be clickeable while pressing ALT.
Doing the sorting at the beginning of the raid and VOILA !!