Procs in Location AOE Debuff/Controls

I recently started playing a Dark/Time Controller and was thinking about getting the Controller ATO Proc to slot into one of my powers. My first thought was to put it into Living Shadows; good recharge, nice number of targets, but then I realised it could also be slotted in Distortion Field.

My question is: How often do location AOEs like that check to Proc? Is it every 10 seconds like toggles and auto powers?

EDIT: According to the statistics on RedTomax, Distortion Field's chance to hold is 2% every 0.25 seconds, but I'm not entirely sure that I'm reading that correctly and I doubt that Procs would have a chance to fire that often.

Ok. So Distortion Field lasts 45 seconds and has the same amount of targets as Living Shadows (16,) but has 4 chances to proc, per target, before it disappears. Which would be the preferable one to slot the ATO proc in?

I believe it is 5 chances, as the proc has a chance of activating when Distortion Field activates, iirc.

On Living Shadows it will only have one chance to activate. Bear in mind that Distortion Field has things has a few advantages here, you should be able to keep enemies in the patch fairly easily, and it will be easier to hit multiple targets as well.

However, be aware that proc mechanics are being changed sometime soon, and I'm not really sure how that will affect things

D field is a bad place to put that proc it will account as if its a 10 sec AOE which PPMs are aweful in

I do know the lockdown proc works great in both powers. Post i24 - dunno.

Thanks for all the feedback on this. In the end I looked up some of the other IOs that have damage procs and got a Ghost Widow's Embrace to put in Distortion Field and put the Will of the Controller into Living Shadows. Neither are particularly amazing in how often they proc, and I'm aware that the algorithm for both is going to change soon, but according to the latest figures from Synapse, they won't be significantly nerfed. And even if they are, it doesn't faze me that much, I'm not trying to turn my controller into some ridiculous DPSer.

That does sound pretty good. Until I got my Umbra Beast yesterday, I had no real source of damage. I just hope that if I slot DF with only/mostly procs, it doesn't become gimped in Issue 24.