Digitakt added to my "On the Road" set-up (and I've been on the road for some time recently).
Circuit and Digitakt are both feeding the Peak MIDI from a Kenton merge, it's quite a versatile system with the longer individual patterns and super quick 6-note sequencing from Circuit but also some additional sweet P-locking of the synth from Digitakt including program changes for making Peak drum patterns. Circuit's also good for making a beat, sampling it into the Digitakt whilst keeping everything in tempo too.
Both Digitakt and Circuit Mono Station's audio input are on the mixer auxes for sampling and filthing up effects duties respectively.
It's all incredibly quick, easy to use and super powerful.... It's a Doozer!