Thanks for the reply Khris,

The only problem with the observational approach is that performances can vary so widely across opponents depending on quality, formations and tactics. Did my AMR have a great day because the opponents DL was weak, or were they playing 3w at the back against my 2(AMR/AML)-2 front or did they attack when I was playing DEF with Counters ON? There are a lot of variables.

Based on this thread I have gone back through many of my games to see if I could identify a common set of players that led to “abnormally good” outcomes. I then took that group of players and played the exact same 11 with the same formation and orders against a strong CUP opponent. 3-0 win one game where my AMR dominates, 2-0 win the second where he couldn't hit a wall but his teammates stepped up. Both good wins is good but I really can't work out who was contributing what.