"Here's an excellent strategy how to play this game, I'm using it.
Power-train them new positions (if needed), SA (if needed) and only after that skills (stars), do it for the whole season. Spend your green pack only on these guys. It is probably a good idea not to let them play, because the old guys usually do their job better than this fresh meat, but it's up to you."

You are right but not that all of the old guys play very well every season, especially after 25 they are starting to show mediocre performances. As you have mentioned, some of 18 years old players really well. I think generally the most effective age is 21 for these guys and I wonder Toxcatl, do you have a thread or opinion about training efficiency of recommendeds and youngsters that we bought by tokens, because they always train faster than both the players we bought from the market and scouts.