As far as compact sequencers go, Mimetic Digitalis is hard to beat. Not terribly well suited for per step on the fly adjustments, but it’s a four channel 16 step sequencer with X/Y CV modulation and sends gate + CV. You can save 16 patches. All in 10 HP.
The o_C has tedious menu diving, not unlike Pam’s. I still think it’s better used as an ASR. I like to send the Mimetic into a 2hp Arp and that signal into the o_C Copiermaschine and from there into the 1V/Oct of a oscillator with a split out from the Mimetic triggering an envelope into the trig of the oscillator. A nice variation is to send two 1V/Oct signals from the o_C into two oscillators of a dual oscillator module (DPO or PH mkIII). Add a slew to one of the 1V/Oct or use an LFO to modulate sync or detune.