I started this season with 1650 greens and 1400 reds, Never bought them.
I dont care about CUP, i am usually iliminated in first or second ROUND, i dont always qualify for cl, so with only 1 game per day is easy to save greens.
I stopped using reds like 15 seasons ago or so, i let players heal by themself, and since i have 22 players, my players are very similar in quality i have no problems. Its not a big dela put players out If position, a DC can play at DMC and vice versa for exemple.