Hi Mejdlo,
I've made a tool that could answer your questions. It calculates the greens needed and it gives an indication how to player will look after you give him specific drills.
you can find the tool in this thread:
https://forum.topeleven.com/tutorial...ning-tool.html.
a quick example i made:
The amount of Green packs will be influence quite a lot depending on which max drill average you put. In the example I used 140%.
Also the level of your drill and the Tier of your player make an big impact.
Anyway good luck.