Sigma 35-50-85 Art or keep 24-70/50/85 Art ?

I have following setup :
Tokina 17 f3.5 AT-X Pro
Sigma 50 1.4 Art
Sigma 85 1.4 Art
Canon 135 f2L

Canon 24-70 2.8L MKI
Canon 70-200 2.8L II

In the past I had the 35 Art but sold it for the 24-70 2.8L I (as I bought the 50 Art later).
Mostly I do modelshoots and some abandoned locations with my wide-angle, +- twice a year unpaid miss events (in the end you can go on stage to take pics of the winners) or a fashionshow.

I have the opportunity to sell my 24-70 2.8L, would I go back to the 35 Art ?
The zoomrange of the 24-70 isn't that big (with 35mm 1 foot back and 2 steps forward for 70mm).

Then my setup would look like :
17 f3.5 AT-X Pro
35 Art
50 Art
85 Art
Canon 135 f2L
Canon 70-200 2.8L II

Anyone has the 35/50/85 Art series together, or does this seem too much of a hassle, so many primes?
I bought the 85 Art the last one as it's the newest, that's why I would have 3 Art's now.
Most common is 35/85 combo, maybe I should sell my 50 Art then.

I know it's a difficult discussion each time 35 Art vs 24-70 2.8 MKI, but the older glass of the 24-70 2.8 I is still good for a Canon 6D or future higher megapix cams ?
The 35 Art has probably newer glass better for future cams.

If you do event shooting and only have one body, I would keep the zoom, if you can handle all the lens changes, I say go for it. I also love the look primes give me. And if I find a good deal on 24L or 35L I will probably will get one.

If I was going the prime route there I would probably look at the 24 art instead for a little more differentiation from the 50. But that is me.