Hi nikol, I know you are more experienced than me and you were researching this power training, which helping us to improve our players. I'd like to share with you and others what I found :
I power train my 4* AMC+ST [18 yo] to give him FC sa, I didn't keep record how many rest pack I used but so far I can tell it was not more than 30, may be between 25-30 green. Today I bought one FT ST 18 yo 3* and I was giving him AMR position, when I bought him he join with 80% condition, which I make screen shot to show you and suggest me if I'm in right track or not please. I didn't use any green on him yet but I'll use tomorrow and I believe it won't cost me more than 45 green, I'm hoping 40/42 green, I use world class "First counter attack". I don't know about old training but if you look my screenshot then it might help your research that new training more helpful or not to save our green
Thanks
P.s: Last season I power train my aml+st and amr+st, give them ml and mr position, both were 22 yo, 6* and it cost me 48/50 green for each.