It sounds like a you want the bulbs to act kind of like incandescents where they get “warmer” as the lights dim, but at the same time act in a circadian manner. Is that right?
I use [RELEASE] Day Lights - an iteration of Circadian Daylight to modify a virtual CT bulb that then sets a Hub variable. Day Lights can modify CT and brightness level and could be a starting point. You could also look at the examples in RM Example: Circadian Color Temperature - #11 by jrau272 as another idea.
Overall, my initial thoughts is that you would have one Hub Variable, a Virtual CT Bulb, and a Virtual Dimmer. The bulb would track the circadian rhythm changes based on either an app or RM. The Virtual Dimmer would track the average level of your dimmers. The Hub Variable would be tracking the offset via Math in RM.
