I think you should save that 34packs for your best T11 squad and use it as "recover" instead. You could train&gain 15 - 20SKP for 35greens, but it all depends on the player (age,training develop/speed etc).
With 35 green packs my best trainer gets 40-45 skill points
Currently playing level 8 (season 8)
The league:
1st place level 1,2,3,4,5,6,7
The Champions league:
1st place level 2,3,4,5,6 - 2nd place level 7