No one can tell you how to train your players by position as the preferences are subjective. The only objective factor is white skill vs grey skill. The former is more important than the latter. Thus, generally speaking, train your players' white skills as much as possible.
Here's a power training tool I've developed to help you out https://r.tapatalk.com/shareLink/top...ink_source=app
Also, see my posts answering a similar question in this thread https://r.tapatalk.com/shareLink/top...ink_source=app