- had the AR and AK to accompany it
I’d sync them with program changes
- had 100ish prerecorded loops-based songs (5-8 OT tracks, 1-32 bars)
I’d use AB TRCs for tracks longer than 4 bars, and set Pattern Scale to the same length (Scale per Track mode)
- set sample mangling via scenes and smooth transitions between songs as your focus
That’s very personal. Check the Transition Trick if you don’t know it.
https://www.youtube.com/watch?v=f1D_UurOook
- decided against song mode, and for freestyle
I’d use Arranger for sure. At least for tempo, reminders. It can recall scenes, mutes. You can easily jump between songs, or looped parts of a song, or Arranger / Pattern mode, so it is not static.
- how would you organise your samples?
Logically, in the track / songs order.
- use projects/banks/parts
If you can avoid project changes its better for sure.
A lot of people use Pattern 1-4 > Part 1, Pattern 5-9 > Part 2, etc…
One song per Part, or per Bank.
- flex vs static?
Flex for short samples / sliced loops (limit is RAM memory), Static for long samples (their main limit is Slice / Start mangling with crossfader or lfos).
- what else would you recommend to somebody pursuing that approach?
Just do it.