I'd get a sequential switch to send Math's and Pam's modulation through so that you can quickly wreck and change the routing of your pitch/control/modulation around the case very quickly. It encourages spontaneous finding of results and not keeping static while you explore your system sometimes. Depending on the one you get, you also get a new pitch or rhythm sequencer source to build a patch around.

NI makes an incredible one. ALM also has the Boss Bow Two, highly recommend. For smaller footprints, PUSH by ST Modular is a 5 step sequential switch in 4HP! I personally have the Bizmuth chaotic signal router which is a little more esoteric. Guarantee adding a piece like this will give you results!