
Originally Posted by
Arphaxad
It depends on your goals. If you train them now they'll lose 20 % tomorrow. So it's easier to train them tomorrow as long as they're young. Another disadvantage training them late in the season is that the high average quality will influence your league draw in a negative manner next season as you'll be drawn against higher rated teams since you'll increase your overall average quality once you powertrain your players.
If I were you, I'd save the rest packs until tomorrow. How old are the players you have in mind?