I was going to tell you to do a search, but I realized that I've never seen a thread with detailed ICC coaching advice.
I've never played ICC05 and I don't remember ICC06 very well, but here's what I can tell you.
To answer your second question first, yes a player can improve with technique coaching, but no, it's not worth paying over the odds for them. Offer what you think they're worth, and leave it at that. Cheap players improve just the same as greedy ones...
I suppose there are two kinds of coaching: practice and technique.
Practice raises form temporarily, subject to the following limitations (not sure if these limitations are the same in your version of course):
- it never raises form above about 70%
- it never raises form by more than 25%
- from below 50, it never raises form above 60
Also, it takes time to raise form, so if you've got a one-dayer starting today, practice won't help you with it at all. Subject to the above limitations, form goes up by around 1 or 2% per day of practice.
Practice has no permanent effect on player ability (at least I don't think it does)
Technique training has no effect on form, but it does (eventually) have permanent effects on a player's ability. It can take effect in a few days, but more often it takes months to have an effect. You will get a player message when your technique training bears fruit.
Technique training has less/slower effect the older the player is. At somewhere around age 27, the benefit diminishes to almost zero.
Players also improve their ability through experience. Even second team experience I think helps, although first team experience helps more, as the quality of teammates and opposition is a factor (I hope...).
Some recommendations therefore:
- if it's a few days to your next match, make sure all your coaching (and physio) points are allocated before hitting continue
- practice is wasted on players who are not selected
- make a list of youngsters in your squad who need technique training. Prioritize those who are selectable eg. perform well in second team, but whose first team stats are disappointing
- during limited overs campaigns, switch all your coaching points onto technique training on match day
- when players get injured or selected for their country, sometimes this frees up coaching and/or physio points, so double-check and reallocate whenever this happens
I don't play international-only careers, but if you do, I'm not sure what happens with coaching between series. I suppose when you don't have a current squad, no coaching is taking place. I'd prefer it if you could continue to coach and perform physio on players, provided their domestic team had not selected them or given them coaching or physio. Of course I'm 100% sure that will never be the situation in ICC05.
The other thing that's very important for getting players in form of course is the second team. I give all my players with form below 60 a run in second team. Even if their form is higher, you might want to select them in second team if they're currently a long way from first team selection. Of course, if their form is currently above zero, there's always a risk it could get worse rather than better, so rest a player whose current form is 'satisfactory'.
I used to think high-profile players would throw tantrums if selected in second team, but I'm fairly sure they don't.
I also used to think that the players you selected for second team had to contribute to a balanced team eg. not more than 5 specialist bowlers. But I'm pretty sure you don't have to worry about that either.
PS: From ICC09 onwards (not sure about 07/08 versions), the game allows you to specialize technique training to the player's specific weaknesses.