D0KTRG said:Once you have built a good team, the incremental cost of an upgrade (say from 88 to 89) is not too much if you sell the lesser card at the right time. The hardest/most expensive thing is to build the first good team. You can then just invest "maintenance" coins to keep it upgraded. These maintenance coins come from playing the game or from playing the market.
Getting nats back from Champion sets really helped. I used to build the champions and then sell them while filling my team up with most of the new cards since most of them were actually good and you don't lose anything selling the champion or if you do, it's like 20-30k which isn't bad. Wish they would at least bring that back