I don't usually post comments, but I have to say that for me ... Ill/Dark is by far much better than Ill/rad which has been my main for years even with him being fully slotted with purples and all tier 4 powers. I created a Ill/Dark as an alt and it has quickly become my main, in fact I can't imagine going back to Ill/Rad ... dark for me is so much better. With the -to hit stacked with a perma defense + SA recovery and regen I am nigh unkillable. I have PA, Phantasm, Fluffy, Tarantula ... all perma plus the incarnate pets ... /rad just doesn't compare. I solo +4 x8 with AV and had no real problems yet. You may have differing opinions, but in my book, Ill/Dark is the better build.