Rad Assault/Rad Melee is the best AOE set and it shouldn't be because bugs.

[SarelFox]

Rad Melee/Rad Assault currently has a bug that if you attempt to hit someone, and there is someone in close proximity to the target, it will roll to hit on them. Even if your target is not contaminated. Even if you miss your primary target. These extra rolls, while they do no damage, will fire off procs. I have missed a target and fired off 5 -res procs around it to a group of guys, or proc'd my extra lethal damage. 

 

Provided is an example.