Does Aloft have settings for coloring the target nameplate?
If so maybe it could be made a very dark/light color that will make it distinguishable from other nearby mobs.
Since the OP is obviously a melee class distance shouldn't be a problem.
Aloft is the first thing I thought of, however nameplates only appear if you're within a certain distance of the mob. I concur that raid targets are probably the best choice.