centerpiece here as well. I do full tracks on the OT.

I run a midi daisy chain:
from the OT to the A4 and from it branches out, using A4’s two midi outs:
there’s a doepfer dark time (/ iconnect midi2 in the future) on one out and the other continues the daisy chain: Electribe SX, Vermona DRM1, Yamaha TX81Z (every piece has midi filtering so they can be easily controlled by the OT in addition to the A4 and 'Tribe having their own sequencers) and then to the computer.
On the computer I have Reason and a separate midi interface to handle keys (the OT’s step seq doesn’t do well with keyboard parts).
Audio runs from all the gear (apart from the OT) is fed to a mini mixer, from that to an old cheap compressor and then to the A4 and then to ABin of the Octa. I keep CDin of the OT reserved for the turntable. then the OT’s output is routed to the audio interface and the cue outs are connected to sidechain in on the compressor.
kinda crazy but, work for me.