I’m assuming that he modules remaining constant are the ones you have?
Adding Rene and Batumi is great, but you need a clock for Rene to work (Tempi or Pamela’s New Workout would do). A filter is great, but look also at QPAS or a state variable filter. You’ll also need an envelope module (Malekko Quad Envelope or XAOC Zadar) and at least one power module. Consider an Intellijel 7U case with Intellijel 1U modules, as you’ll want an audio I/O and some attenuverters.