@Tyltyl also never let go of the academy players. No need to even waste tokens to reduce Q. Usually a goalie, 2 defenders , one or two midfielder(s) (DMx-Mx) and 3 attacking players (AMx-ST) [ie 7 players] should be always present in most of the games. That's where multiposition players come handy. I tend to buy DL/DC, DC/DR the most since it's quite limiting for me. For that reason I'll let go of Kroos(DL), who's been in bad form for the last 10 days or so. The only single position players I'll recommend are DC, MC and ST. It's very hard to find multi position attacking players, so don't let go of them.