Attempting to build a simple box with 2 or 3 voices and lots of modulation options.
Am I missing anything important? Sequencing and output are in a different case.
You need a larger case and more utility support modules. Instead of Maths, perhaps go with Batumi as it takes up less space and easier to use. Also the Instruo Divkid 0chd gives more modulation in space sized HP module. For voices, consider a polyphonic synth module like Knobula Poly Cinematic or Acid Rain Chainsaw as they are not large modules but pack a lot of features.
I'd say keep maths and add batumi - get a bigger case - a mantis is really only just big enough for 3 voices - you need to add more utilities - mixers, vcas, offsets, attenuators, logic etc etc these add versatility for relatively little cash - see my signature!
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities
