You can get clean video even at ISO3200 when using CinelikeV!
.... ISO1600< Cinelike V (contrast/sharpness/nr/saturation -5) and of course no Highlight/shadow "enhancements" and iDynamic/iResolution crap.
I may test that out. I have been getting good ISO1600 footage from Cinelike-D with Contrast set to 0 and NR at 0. I will try your Cinelike-V settings and compare. Cinelike-V is a contrastier profile that also places middle gray higher than Cinelike-D. To get the same exposure as Cinelike-D, you will expose Cinelike-V to the left by 1/3 stop. So the added contrast and consequent lower exposure drop the noise into the shadows. Makes sense.