I think it’d go nicely with that top row:
- you have a nice set of looping modulation (LFOs) in Batumi
- you have some dedicated VCAs
- you have sound sources that like modulation
- O+C is a catch-all but not super-manipulable given its UI.
so you’d get some triggerable modulation, or some interesting looping things, or some audio-rate utilities, or a grab-back of useful tools to have on hand.
@stripes is definitely right about working out what you want and avoiding “forum-hype”.
And yet: I’m increasingly convinced that some kind of (dual) function generator is a super, super handy thing to have, and unlocks lots of things that modular synthesizers can do: yes, it can be ‘a pair of envelopes’ and you can loop them to make cycling modulation (and, using the offset channels, make them genuinely bipolar). But there’s so much more in there - making use of the EOR/EOC channels to delay gates, or generate square/pulse waves, or using a channel as a slew, or a crude filter, or etc, etc. And a key part of what makes Maths specifically interesting is the way its voltage math channels - the attenuverted 2/3 channels - interact with channels 1/4, if you like. The other trick with Maths is not to think of using it for something that isn’t complicated or rich as ‘a waste of Maths’; if you need a trigger delay, and you have a Maths channel free, use Maths!
It also unlocks a more west-coast (sorry) style of patching that I, personally, find interesting and rich, and barely represented outside modular. I think it’s a key part of the vernacular of the modular synthesizer, and Maths is a great way of discovering it.
@oscillateur is also right in terms of asking you what you want to do, though. 20HP of Maths is a lot if it’s not quite what you’re interested in or need, though I reckon you’d never get rid of it and get a lot of use out of it. But if your inkling to acquire one is ‘maybe I need a Maths, I dunno’, then perhaps there’s another direction to go in first.
As with so much in modular land: it all depends on what you want. Maths is one of the few things I think is never a waste of time, simply because it’s such an effective tool at reprogramming one’s brain as to what synthesizers can do or can be.