Need help with my drainer build plzzz (elec/rad)

So I have a fun times elec/rad drainer corr. He's a blast, but I havent really figured how to build him totally yet. I could use a hand....
I'm on a Mac, so no mids.

http://planner.cohtitan.com/view/135

Thoughts?

Looks pretty solid for end drain on what you have. But you don't have EM Pulse which can be a good end drain power. Also Elec/Kin would be better for a drainer build IMO.

I forgot to mention that this is PvP zone duel, and Arena based. I keep the enemy at 0 end while my pets take them down damage wise. Im just looking for some IO ideas that would boost my survivability

I think you should ditch thunderous blast, slot some end mods and range into telsa cage, get some damage slotted into your two attacks, and then switch over to an IO build

A couple end mod IO's in telsa will give you better draining capability in pvp than slotting your two attacks with endmods.