I would not opt to work in ProRes on Win, You cannot generate ProRes on Win (thank you, Apple), so your titles and renders would need to be in a different codec, which is not great when you need to do self-containee exports. Also, you would only be able to import as ProRes if they shoot 1920×1080 – if they shot 2K, it needs to be scaled back to 1920, so that wouls require a transcode anyway.
I would say there are two ways to go about this.
1. AMA-link to the files, select the clips in the bin, apply LUT as needed, select Clip-Transcode and transcode the clips to a DNxHD flavor of your liking (DNxHD36 would be great for offlining in HD. Conform can be either done in MC by relinking to the original ProRes files after completing the cut, or via AAF or EDL to a third party conform and grading tool (Resolve, Scratch, BaseLight, NuCoda, etc.).
2. Use a 3rd party tool (many available, Resolve Light does this as well) to apply LUT and transcode to DNxHD Avid MXF media. Conform can be done inside MC by relinking to the original ProRes files (slightly more hassle as you need to relink source file names to tape names), or in a 3rd party conform & grading tool.