Assistance with pleasant sounding modular effects rack

Hello!
I mostly play synths and acoustic instruments. I have a small modular unit that use as synth, too. At any rate, I recently bought a Rainmaker and a Beads module and realized that I really, really love using my modular as a complementary effects rack. It's smaller and in many ways more powerful than my giant pedalboard, and it's more versatile, to be sure.

I'll be putting the Rainmaker, Pam's, and Beads modules into the synth (stolen from my other rack), and I expect to be using the Tip Top Audio Mantis case.

Most of the music I make these days is more ambient in nature, and the closest analogue is Jon Hopkins' 'Music for Psychedelic Therapy' in terms of what I'm trying to do with my most recent project.

Any thoughts on good modules? So much in modular seems to be focused on the edgier side of things, but I probably skew closer to Lightbath:

I don't need an oscillator in this rack, I'm planning to build a separate rack for sound sources, and I have too many desktop synths anyway!

Thanks!

Rings would probably be a good call.

A resonant filter bank might also be worth a look, like a Serge ResEQ or the Erica Synths one. A dual/quad filter arrangement (like QPAS, Eowaves Tempetes Magnetique, or the Xaoc Belgrad) might also work. There are lots of options for both, so take a look around.

Be sure to balance modulation and utilities (both playable and flexible) with the effects so you're getting the most out of each module.