Regis
17
I use OT as a centerpiece also.
AB In is used for a Machinedrum
C In for a Mic pre/DI unit.
D In for a Monotribe.
I also route a downmix of my two keyboards, from my soundcard outputs to the MD inputs. That way I can process the MD and synths on one thru track.
I like the idea of having a mic/DI input at hand on the OT to capture stuff on the fly. ( hmmm. I should get a piezo )
Started out using long samples, stems I made on the computer, but that’s just missing out on p-locking fun IMO
As someone said once on this forum, on the OT, less is more.
Shorter samples, stuff you grab on the fly, sample chains, waveforms, blips hits and foley are stuff that are on my SD card now.
Been using
4 to 5 flex machines
One or two thru tracks,
Crossfader sampling track
Master track (compressor and freez delay)
I like the LoFI, dark reverb, filter,
I use the MIDI sequencer but its bad at receiving midi chords from a midi keyboard so I rarely hookup keyboards to the midi In on the OT
I also have a project dedicated to sampling with 8 tracks receiving from AB in with maxed out length. I use it to get samples from stuff I watch on the computer. 
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