As is it is a solid build.
Decide if you want to soft cap or not. Right now you're between 32% (enough to cap with a small inspire) and the soft cap of 45%. I personally, especially on a team build, wouldn't worry too much about defense at all. Stealth, teammates, PA and Phantasm should be more than sufficient to avoid most aggro. And none of that takes RI into account. That said I was able to cap range without losing perma AM or perma Hasten while playing around in Mids (and hit 32%+ on everything else) but it would cost you a couple seconds on PA's recharge from around 63 to 65 sec prior to any Incarnate boosts. Spiritual Core Paragon put it at 58.54 seconds. (EDIT: To clarify by only changing slotting and enhancements. No change to power choices)
Slot Apocalypse chance for instead of Apocalypse Damage ... better damage output as you are hard up against ED. Procs apply the damage without concerns for ED.
Same choice pops up with Ragnarok in Fireball but the choice is about damage vs mitigation since the proc isn't a damage proc.
Lingering Rad needs accuracy (or the build needs more global +Acc) ... RI, do to AV debuff resistances, isn't going to help enough to reliably land LR on endgame AV's at least it wouldn't be reliable enough for me (unless your level shifts drop them to effectively +1 AV's I believe or a teammate with a nice To Hit buff to drop on you).
Suspect Fly is a personal preference? I skipped both Superior and Group Invisibility and went with both Deceive and Flash gaining my stealth from Super Speed + stealth IO. Of the two suspect I'd miss Deceive far more than the pbaoe of Flash (not to mention the cheap purple set with a +ranged def in the Confuse set of Deceive).
I'm sure there are things I'm missing as well ... so I also do recommend you do read Local Man's Guide 
No doubt Local Man will pop up with a suggestion that I take a look at his Guide to Ill/Rad. But I was just wondering if anyone just could critique my build for an Illusion Control/Radiation, rather than referring me there.
Swapping out the Uniques (swapping the ones in Blind for a set of 4 Basilisk's Gaze and taking the Gladiator's Armor off, and perhaps moving them to Accelerated Metabolism to complete the set) is something I definitely plan to do until I can be bothered to afford them.
Anyway, thanks for taking a look if you do!
http://www.cohplanner.com/mids/downl...A4FF07B7B9F03C