I play in 4 competitions too and never have a problem with green packs. What Moi says is true. 8% is really easily obtainable with a full squad. Your main squad plays and your reserves crank up the training bonusses. Easy. I am in the league, CL, Cup and Association, never have problems.
If you want 100 green packs and invest them then you have too much time on your hands to be honest. Enjoy real life too![]()