Audio and Music Director Building First Modular Rack

I am new to modular but have been tinkering with synths and analog gear for years. I am mostly interested in genreative and ambient music while sculpting tones/textures, and blurring sounds into a new life.

In my first online dive into modular I was immediatiely drawn to Mutable Instruments and would like to continue to collect their modules, I think. Outside of what is in this rack... what is missing or could be added to compliment? I have mostly been using these as effects in the classical piano genre, to generate never ending soundscapes, and even some product audio design needs. Its easy to get lost online and on YouTube so I thought it might be helpful to turn here for a more direct stram of advice etc.

I feel like what I have so far is amazing and never ending already but I am still eager to add and explore.

Thank you for the help!

EDITED Aug 11th, 06:55

If it were me I would look for modulation souces of randomness and probability you can do something simple like using NLC Sloths to modulate Ochd or add small utilities like Noise Engineering's Clep Diaz for some clocked but random modulation, the 2HP RND is a good one and doesn't take any room up. I quite like the Befaco Burst because it has a probability control and a lot of control over its bursts though it is Clocked so expect a regular clock tick to come out of it which usually works for me but i sometimes wish it wasn't there when I want less structure. You can get little CV and gate generators like the ST Modular Isi Wren which is surprisingly useful for Rhythmic control of Filters etc.
You can't knock an un-clocked Mutable Instruments Marbles with its range of CVs and Gates.