Every time a card is received, hit the Compare button. If the card has been still an improvement, keep it. If not, add it to a set. In case it does not belong to some set, auction it or quicksell it. Maintaining it organized saves double-digit hours over the duration of the year.
Do not dare sell or auction off a single card before looking at the sets first. A few of the sets could be earned entirely through interrelated challenges while some can be gradually earned with even just a small bit of luck throughout the year.
This is a great way for players not seeking to break the bank to deserve exactly the very same cards as others that sell their cars. With a bit of patience, add any additional players to a set. Even if the reward isn't an update, the reward constantly sells for more than the total of those parts to make the card.
It is healthy to steer clear of the store completely since cards get slowly better as seasons move on and cash spent at the shop for cards today is going to be money wasted the moment the cards of tomorrow are released. But it's the limited-time cards that are the largest waste. They are tempting since the challenges only give enough to almost finish a place for a great card, but this fantastic card will not be so great whenever the next limited-time event hits.
The game mechanically rates cards based on a variety of factors, all the way around 99. Yet those who assess statistics will observe that some ranking 78 cards will often outperform rank 99 cards. It's critical to look at the individual stats.