Here's what I do:
20m in training. Training develops, and slows decline, in the physical categories(range, power, arm accuracy, etc, etc)
20m in medical. I don't worry about injuries.
16-20m in college OR scouting. At best, you might get 3 picks in the top 100. No need to scout both.
6-9m in coaching. I don't have to have the best, I'll take "good enough".
The rest are fluid. High payroll = no international scouting/high prospect.