I might invest in maths but Im kinda afraid it would be a waste of money since its kinda hard to understand :/
Mixer wise I quickly learned that i need more asap since i basically use my tangle quartet as a mixer and triplatt as a vca. Still dont have enough though.
As far as voices go I have surface and nebulae but at the moment I can not make them sound 'good' together. I end up using the clock from bloom and its controls are not ideal and I have to mult it to pretty much all my modules as well as dfam and i can not divide the 'channels' so everything sounds very robotic (not as much as harware synths but still).