To me it's CL, league and then cup at last place.. in the first few seasons it looked like it's cup cuz I had lots of teams from higher levels and prizes were 3 times bigger than in CL, but now when I'm at level 15 it's not like that anymore.. prize for reaching cup final is now lower than 10mln for me, even highest win bonus for players cost me more than I get from that final lol..