"mild" A15 -- do you mean lower RPM than factory tuning?

Weber 32/36 Baseline for A-series engine is as follows
Main Jets: 140/140
Air Correction Jets: 170/160
Idle Jets: 60/50
Emulsion tubes: F50/F50
Jump jet: 50

But you can you use any tuning for a baseline. You note how it works, then modify it depending. The main/air correction is the last thing to check, first check idle mixture range and acceleration transitions.