I have 2 at the minute, I'm celtic, top of the league, 2040, looking to bring some of the best regens in and turn them into something special. Will I need more coaches or is 2 fine?
It doesn't generally matter how many you have just the quality of training the players receive... if you have achieved 5 star and above with a lowish workload for the coaches, then extra coaches wont make much difference.
If you don't have a coach covering each training category that is high in working with youngsters then i would hire more paying attention to these key attributes... (all of which ideally need to be higher than 13... but working with youngsters is essential and i would take anything less than 17)
working with youngsters
determination
motivation
level of discipline