You don't need to use Hue scenes to use DBC. It will just soon be an option. As stated in the description, it just otherwise provides for you an option to emulate the behavior of a Hue-paired Hue Dimmer on Hubitat by, among other things, cycling between different bulb settings by manual input of values (color, color temperature, etc., like you're doing in your rule). This is basically what you're doing in your rule but with less clicking and would solve the issue you referred to, I believe.
I guess this question was never answered. My opinion is no, but to get what you want with RM, you would indeed need separate rules. Once you get one perfected, you can create others for other bulbs. But a personal rule (no pun intended) that I have: the RM UI is a bit cumbersome to use sometimes, so whenever I see myself creating a few rules more than a few times (at least ones that take a lot of clicking to create, and even more painfully so when I'm choosing the same device in every action but can't just choose it once somewhere as you also desire), I write an app. That's where the above came in.