Cant really comment on the sonic side, which is probably more wat ur looking for, but i can tell u that the rad attacks are pretty good when u get them slotted with so's. Neutrino bolt is a waste imo however id disagree with the sniper attack. Its a very useful power to start your attacks of with, with reasonably high damage, and i also use it repeatedly after cosmic burst (disorient) in pvp and one on one with bosses in pve. Irradicate is pve pullin magnet, but slotted with def buffs i find very useful, although has been the cause of several deaths. Go with what u like, u can always respec them out at a later date in any case.
As hard as it was for me to admit, Rad blast is pretty poor for PvP. The only thing it's got going for it is cosmic burst 
IN MEMORIUM OF GAYBABY
CRUELY TAKEN FROM THIS WORLD WHILE SO YOUNG
You think? I know its not the biggest damage pool going, but id still say the damage is pretty good for pvp. Im playin rad/rad so with the buffs going, one on one with a hero iv rarely been defeated. It may be that the rad secondry is the main reason as they cant really hit me, but you still gotta kill them, and with sniper, cosmic burst and constant xray beam, the odd irradicate and neutron bomb, most heroes go down fairly quick (last two powers mentioned iv got slotted more for buffs at the min).
Low burst damage = bad for PvP. Neutron Bomb has pathetic damage, sniper requires you to be still, and that's very bad in PvP. Also, both have silly animation times. Shame really cos they look and sound so damn awesome!
IN MEMORIUM OF GAYBABY
CRUELY TAKEN FROM THIS WORLD WHILE SO YOUNG
Well over the weekend, i took a trip into the pvp zones with me corruptor, and one on one he done pretty well. Groups he was pretty shocking as would buff one then someone else would attack, but in duels, it was a sucess. As soon as the buffs are on, with hasten in use, cosmic brust and sniper were all that was really required with the odd xray beam. Managed to take down blasters with ease and also a scrapper to my surprise. A big part i realise is due to the rad secondry, but im happy with the attacks for now as well.
Aye, true, it's good for duels 
I had a quick one against an elec/elec the other day and I wasn't shockingly bad even with my un-optimised build. I think I'll be making a duel build, with the snipe. I love the sound it makes
IN MEMORIUM OF GAYBABY
CRUELY TAKEN FROM THIS WORLD WHILE SO YOUNG
Personally, when it comes to PvP, I wouldn't look beyond ice/* or fire/* for my primary.
The hold in ice and quick one on one damage it can pump out are very useful and fire for the pure damage
The only time I would look at rad, dark, sonic etc is if I was going for a combined build like rad/rad or dark/dark just so the secondary effects from the attacks stack with your main debuffs.
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I think I'll be making a duel build, with the snipe. I love the sound it makes
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The sound being stolen from He-Man of course..
OK, got a rad/sonic up to L10 with the intent of making a pvp build. So far I've been underwhelmed with its performance in pve and dubious about it in pve.
x-ray seems a decent attack. Irradiate is an aggro magnet in pve - anyone had experience in pve? Not bothered with the others so far - snipe and neutrino bolt (previous threads have suggested they're not the best for pve). On the sonic side I have both shields and sonic cage. Shields are fine but the sonic cage is broken by cj so seems like a bit of a waste.
Anyone had an experience of this type of build?