Choosing camera+lens to rent

[balka]

I want to make a half hour movie. I want to say in front that I am not expert in this field and I have never worked with such serious gear before. I understand that many things can go wrong, but I am still willing to try.

I want to shoot in 1080p @ 50fps. I want to get a video (non-cinematic) look that is very crisp. There will be indoors scenes (with adequate lighting) where I will be shooting monologues, there will also be outdoors scenes with relatively fast moving objects. I will not shoot anything in dark. Multiple retakes will not be possible due to time constraints. I will be one-man band.

I will be renting all the equipment I need. I cannot decide between what camera+lens option I should go with. I have already selected other gear.

I have a few options to choose from:
Nikon D750 + Nikon AF-S NIKKOR 24-70mm f/2.8G ED
Canon 5D Mark III + Canon EF 24-70mm f/2.8L II USM
Sony A7S + Metabones adapter + Canon EF 24-70mm f/2.8L II USM
Panasonic GH4 + Panasonic Lumix G X Vario 12-35mm f/2.8

There is a reasonable selection of Nikon and Canon lenses that I can rent. However, there is only one Panasonic lens and no Sony lenses at all. Canon set will not allow to film in 50fps, but I will get RAW (using ML; downside - slow workflow) and it seems to be a very popular choice. Sony set will cost me twice as much compared to other sets, in theory should offer the best video quality (S-Log2 (downside - min 3200 ISO), very crisp). With Panasonic set I will get smaller sensor, very high bit rate, CineLikeD and probably lower quality lens compared to Nikon and Canon alternatives. It feels like Nikon set will be the best choice for me.

Please advise.

P. S. I have read a comment about that Panasonic lens in my list, which I don't understand. It has a fixed aperture. How is it any worse in terms of zooming + exposure change compared to Nikon or Canon lenses that I have listed?
Here is a comment:
"When zooming in and out, the aperture adjusts to the 4 focal lengths...i.e...this lens is NOT stepless. That means that if you attempt to do a pop-zoom or even a regular zoom while filming the image will darken or brighten (depending which way you are zooming). It looks like you are opening up or stopping down the aperture. It's not a fluid opening or closing like the Canon 24-70mm f2.8 but abrupt adjustments like clicking the aperture open or closed. I shoot a lot of handheld comedy and sometimes want to be able to execute a "pop-zoom" for effect. You can certainly do it with this lens but it won't look good."

[Xavier Plagaro Mussard]

I want to make a half hour movie. I want to say in front that I am not expert in this field and I have never worked with such serious gear before.

Why don't you make your movie so good that you can shoot it with an smartphone??

Using money to rent gear you have never used, it's a really nice way to loose money. If you need serious photography, find a low-budget DOP. 

Cinema is a sports team!