hi spaghetti -
Are you controlling Ableton with TouchDesigner or do you have controls from Ableton sending into TD?
I recently completed a music video where I had written a bunch of automation in Ableton that was controlling parts of my TD patch. The way I made the offline render was to do a play-through of the song with Realtime turned on in TD to capture all the automation into a Record CHOP. Then, when I was doing the non-realtime rendering, I looked up the channel values based on the current frame of the timeline.
Is that the pipeline you would need?