I like sonic myself..and there is far too few of them villain side. For that reason alone I would try it..you will be most welcome in any team. I cant speak for elec blast, but the sonic siphons would help boost the damage...while power sink for a patron pick would assist sapping
I love Sonic, it's my favorite Corrupter secondary, Controller secondary, and defender primary.
Sonic Rocks. And electric is great for AoE and for sapping. Just don't get sucked in to thinking you'll do a lot of single target damage. Get Ball Lightning and Short Circuit, you'll have lots of fun.
Was wondering if anyone had any thoughts/ideas for an Elec/Sonic corrupter. Thinking about running one but kinda lost on where to go with it.