Dear Aurelien, appreciated.
I acknowledge, what I need may never be in any module, exactly as I had in mind, but using the dt features and kind assistance and hints from some on the forum, I’ve arrived at a solution, that I am very happy with, which uses 3 instances of the color balance rgb module, does not break any scene referred workflow rules, and with ideally tuned grey value based parametric masks for each region, gives me the next level of contrast control I needed, in addition to whatever else is available in filmic.
Filmic is superb for what it does, broad global contrast control across the whole image. I just wanted some more ease and control of exposure(Light) in 3 or 4 partitions, not just the black and white extreme ends. and I now have this. No development required, as the ingredients to achieve what I had in mind are already in dt (the dev version)…
Thanks.