@MA Visuals
The initial DNG/cDNG to Cinelog-C needs to be done in Resolve because it uses a special shaper lut (65x cube 3D + 12bit 1D) to convert from Linear RGB colorspace to Cinelog-C Wide gamut but the output and look luts should work fine in any .cube compatible NLE (we can convert to other lut formats if required). A lot depends on how Premier/AE sees levels (data or video) but we can do something to scale the output and look luts if there are levels issues in other apps. I'll add the recommended workspace settings for Premier/AE in the accompanying guide (I need to check what is best).
TBH I'm not sure if Lumetri can read hybrid shaper luts?
. A 3D lut (even a big 65x65x65) doesn't have enough code values in the gamma part to accurately map every value needed for conversion to log so they can exhibit fine banding. If you debayer, white balance and transcode in Resolve first you should have no problems working with the footage in Premier. If you need to revert Cinelog-C back to linear RGB you'll need to go back to Resolve as that too is a shaper LUT (linear ouput should be .EXR or DPX to handle the dynamic range).
Re: Osiris - what source colorspace do VisionColor recommend for using Osiris? If it's VisionLog we would need to make something. If it's REC709/sRGB there is already a lut in the new pack that will do it (plus we can convert to other gamuts (if needed). I don't have either of their lut packs (yet - the Impulz filmscan pack looks promising) but we will work out the best solution if needed.
For both OSIRIS and Impulz, what they recommend depends on the camera. If its a DSLR h264, they recommend a non-log but slightly flat profile (usually their own visioncolor\visiontech picture profile) and the LOG versions for RED, ALEXA, BMCC, BMPCC, Magic Lantern RAW etc. They have recommended using VisionLOG in between to standardize the "log", which Ive had decent success with both with OSIRIS and Impulz. I use the MLRAW VisionLOG luts in the Impulz package and the LOG luts for OSIRIS.
A neat trick i found if an Osiris LOG LUT was too intense and backing opacity down wasnt helping was to try the rec709 lut. I know, completely not how its supposed to be used, but it creatively suited the purpose.
Long story short: Yes, i believe OSIRIS is optimized for VISIONLog but i know plenty of people who use it on RED footage without issue. THat being said, RED footage doesnt have the strangeness that ML RAW set to BMD Film does, so we may need a intermediate conversion like VisionLOG or CineLOG to standardize