Shard Zero was an ice/energy blapper.
Not so much jumping in the middle of mob groups than moving in and out and taking down bosses then lieuts.
Freeze Ray + Bitter freeze Ray + Aim + Build Up then run in and Smash Smash Smash ! :o)
And throw in a blast or two waiting for the heavy punches to return (plus freeze holds as soon as they cooldown).
It's way more destructive than a scrapper, with the thrill of going in more or less naked (lots of "zzzzzz" ahead without a def or a troller to look after you).
I also didi an elec/elec blaster, but didn't reallly played it as a blapper, focusing on the energy drain less than the scrapping (and the drain was just amazing ).