No, 0T academy players are slow trainers (90%). I keep some low q (for under-leveling) purpose and test them. Avoid - (for training, as players depends as for everyone).
Nordgen, scout/list and T academy players can give the added value but only for a player who has extra sources (farming, buying, down loading apps for mobile).
For a 35T player (only with the sources from the game), the best investment is buying 5* players, 28-30 y.o., who can perform good, bought with few T and play for 2-3 seasons as good performers - I 've tried that too
If a manager can save some packs after 3-4 season, then can try 1-2 nordgen.
I have bought so far (I 'm not quite sure) 12-13 scout list players - avg 1 per season.
1 GK, very good
3 def. very good
6 MC , 3 very good, 3 flops
3 ST, 1 flop, 1 good, 1 hmm (not bad but not a scorer).
It's not worthy to invest greens to scouters. Because of their age and high q, they do a training of a (about) +35, 3bars/practice - the young ones, 22-23 y.o. .At their 8*, much less, +10-15% - with the risk of injuries of course.
But it's worthy to invest some greens the third season, when they are 5* player, so can keep them for a couple of seasons as high q players.
I don't train my players over 6*.
- It needs a lot of greens (even for a farmer)
-I 'm not sure if a 8*-9* player can guarantee that he 'll perform always good or get more rates of 8-9 from a 5*-6* player
-Having so far a team of 6* + 5* players was enough for me to won any title - even a tremble.