Hi, Vagelis.
ProRes and MXF is ordinary YUV formats. For finishing in Avid or Smoke, render full range.
When importing full range data to Avid you can choose “import RGB” – it will remap to 16-235.
When you export, export to RGB and it will remap back. This is ok, and gives you no quality loss.
As long as you monitor video levels in Resolve, place the MXF-files in the the avid media folders and drop the database file in your bin – you will be good to go. And, your scopes will read 16-235. Its a default remap as Avid does not work RGB internally.
If you want to work RGB all the way through AVID you need to set up your monitor to show RGB (not 709) and buy a Avid Nitris. I cant see the point and know noone that benefit from doing that.
STig