I did a live set once with only a MK1 Rytm, Infinity Looper, and Vestax DJ mixer (to mix the loop with the Rytm.
It can certainly be done, and all the tips about pattern setup that you’ve heard here are crucial.
I’d go one further and advise to setup your patterns to no more than 4 patterns per “tune”, with those all referencing 1 kit.
Similar to the “Parts” scheme on OT, this gives you 4 tunes per pattern bank.
For one project, that gives you 64 tunes to work from without changing projects.
From these 4 patterns, using mutes, performance tweaks, and fills, you should be able to arrange each tune live in front of your audience, based on the energy they are giving you. Not based on a pre-ordained arrangement in song mode.
To take your 64MB Project RAM over 127 sample slots further, which you will want to do to actually get 64 unique sounding tunes into one project, I recommend using some sample chains. This way you can have hundreds and hundreds of sample hits to work from.
There are a lot of threads here on the subject of Rytm sample chains to search, if you wish to take the dive. As well as free chains for Rytm (different than OT chains!) in the Files section, all right here on Elektronauts.
Going back to the Infinity Looper. I think the Boss RC-202 has surpassed it in sound quality, price, and functions. It’s really all about the MIDI sync and record quantization. Until the RC-505 ($$$) and RC-202, only the Infinity was winning in the “quantized record start” category.
But whichever stereo, quantized looper you may choose to go with, a mixer with a stereo aux send (not just stereo return) will be crucial to making it work simply and effectively.
Unless it has the word “Octatrack” on the faceplate, of course