Ah I didn't realize the beta CtA before. That is of course a huge help for her.
I respec'ed the other Sorc and ran a bunch with 200 FCR on the other map. I wasn't able to reproduce the 16.7 second runs I had yesterday. (I didn't record those so I don't know, maybe I skipped minions there or something, or runs just went perfectly right.) Uploaded one "not perfect but overall solid" batch, averaging 17.1 seconds:
It could be a tiny bit faster since I had a couple of misclicks, and I'm still using low roll facets because I didn't want to commit good ones yet (and likely won't). But those things don't add up to the difference to 16.4 seconds which I can get with 105 FCR setup:
Regarding council movement, again I didn't notice a difference with 200 FCR. If anything they moved a little more. Which makes sense actually: If for example run time is the same, then slightly more time of the run is spent fighting the council (because less time is spent teleporting), which can give them more time to move around.
So in short, in my case at least 200 FCR provides no advantage over 105 FCR. Of course could be different with perfect map and stuff like beta CtA. But I'd assume also for others it's not any better than solid 105 FCR setups (at least with current-patch gear and humanly possible maps

). Lower life, lower MF, no healing from Hellmouth, higher mana usage... Individually that's fine in each case, but in conjunction these result in more uncomfortable running, while not providing a speed advantage it seems.
That being said, very cool approach in the first place. Generally it's nice that you still try to push the limits, and your demonstrations are very helpful in seeing what is possible. (Until just a couple of weeks ago when you posted sub-16 runs, I wondered if I could even averge sub-18. Now that's kind of normal.

)