The dual Doepfers kind of kill a lot of HP. Malekko has some interesting options that combine sequencing with envelopes or CV modulation. You can make room for them by switching to a 7U rack and using tiles for some of the functions (I/O, power, mixer). I added a steppy sequencer but you could also use two Quadratt tiles as sub mixers. Also, consider a dual FX in a more compact form, unless full parameter control is a critical component.
Ditching a few modules with non-essential or now redundant function allows you to add a BIA plus compressor, which is a Techno workhorse. Consider a Pico Polivoks VCF for a sub mix. Tallin combines a dual VCA with drive and a stereo mixer plus Pico A-Mix for FX sends round out a alternative version of “your” rack:
