Thanks again @Ronin1973.
I think I just have to go down the route of playing around with the stuff that I have now for a few months and then eventually start replacing the stuff that I don't gel with. I feel like now, while perhaps not set up to any one thing really well, I do have a decent setup for exploring and learning what can be done with a modular system. I can already see that eventually I might move either Elements and/or DFAM out of the rack and use that space for more modulation and effects. But all this stuff is so deep that it is kind impossible to know "what you need (or want)" unless you have some basic sense of the possibilities. I mean, I spent 3-4 hours yesterday just trying to wrap my head around the basic possibilities of the Clouds module, and realised there was so much there that I hadn't realised at all while just playing around before.