How are you guys "Automation-triggering" your Fibaro RGBW (confused Noob here)

Yes to all of the above, except that I think you would just have to install @Motley’s smartapp once for each preset and then it should work. That’s typical of smartapps, nothing to do with the Fibaro, there are a lot of smartapps where you end up with multiple installs just to get everything working. The exception is smartapps like Smart Lighting or Core which have a “parent/child” structure (SmartThings terminology) where you only have to install the parent once and then it can create multiple children.

But I’m just guessing, because I rely on text to speech I can’t read the code and I haven’t tried that smartapp myself. So I would ask in the Fibaro thread and someone there should know for sure.