For wavetables I like the "4ms Spherical Wavetable Navigator". Adding a Joystick to this would be great.

it has 6 voices with chords implemented.

Do you have all the modules in the rack?
Which music genre do you focus?

With the other gear you seem to be very good set. Because of that:
If you not mainly in modular, maybe think about to only add some eurorack modules as utilities to compliment your grandmother and dfam. Just said, to save money.

Otherwize:
do you need 2 maths?
maybe less erica synths?
what about noise sources, distortion / saturation?

maybe some schlappi engineering stuff like interstellar radio, 100 grid or a Benjolin?

I like the Benjolin V2 for sound design. It has also a nice filter

a nebulae or morphagene for resampling, glitches and tape effects?

qu-bit Aurora combined with noise sources?

Befaco Noise Plethora = great noise source with analog filters.

Greetings

Chris