Any player that basically gains more than 5Q in a season is surely a power trained player for that season.
Well power training would be hard to supervise.. If you save up boosters for 2 seasons from gifts/ friendlies you can get a decent amount to power train a player.
TuaMa: Season 3 team
Season 1: Cup Preliminaries and League winners
Season 2:Cup preliminaries, League winners and Champions League winners!
Season 3: League winners, CL winners Season 4: In progress.