F55 Proxies from RAW

Recently shot on an F55 to both sxs and RAW. Because of a snafu on set, we ended up with XAVC proxies with a burt in LUT.

I'd like to do some minor grading in resolve but from a log image. Does anyone have experience with taking F55 RAW footage and turning it into pro res proxies for cutting. Basically scrapping the SXS XAVC proxies from camera and working completely from the RAW. Or am I way off and the amount of render time this would take is completely unrealistic.

If you have a beefy machine it should be in realtime.... (or a bit better than realtime)