Depends on your goals.
The problem with EM is that at the top end it puts out similar ST DPS to several other sets which are just plain better.
If you simply like the concept, you can work around the issue by going Mu and picking up E-fences and Ball Lightning. Then you'll have 2 TAoEs, SC and Whirling Hands.
You won't win any awards for AoE damage, but you'll have made some definite improvements over what EM brings on it's own.
Any reason you want EM specifically over KM or any other set for that matter?
I think you'll find that in practice the amount of corpse blasting you end up doing will be your downfall. If you solo a lot, no problem.
And like the last poster said, if you want the concept/look, go for it. If you're looking for pure performance, there are sets out there that do comparable, if not better, DPS, and have more AoE potential and/or utility.
You can color Dark Melee to look more like energy, have a better ST chain, a self-heal to cover the only hole in Shield, and Soul Drain.
I know EM gets an awful lot of flak, but running some numbers, it can put out solid enough DPS. I figure shield charge, the AoE moves from abysmal to forgivable. The +HP in shields makes ET hurt less.
Will I regret this roll?