It is better to buy duplicate 60 to 65 over cards and upgrade there ovr by 1 using their duplicate and then use them to train your players, this way you will get 60 to 80 extra exp per player and will save a few million coins. It is time consuming but very effective.
Yes, you can and I tried this way also and it was so boring and long for me. Cards below 65 Ovr are less supply and cost even more in most cases, than 65+. You probably can save some coins, but if you training your card to max it gonna take days to find all these cards. Practically it’s much more enjoyable to just buy all players and use them, than searching duplicate players and train them only for 80 TXP.
