tbh I would prefer if you finished Ryuki before Kuuga, if only so we can finish a lot of conversations we left open and hanging because they depend on ending or mide-season or movie spoilers.

Kuuga... it's gonna be there. It doesn't move or change much from what you've seen. How can I put it? Even though I do like it, quite a lot, it doesn't really inspire me lots of thoughts and theories like other series. It basically is what it is, there aren't hundreds of small layers to explore past what you see. So if you watch it first or last or somewhere inbetween, it doesn't really affect your fan experience much. Or idk, at least that's how I felt watching it.