Check the points page for best values. https://www.muthead.com/prices/xbox-one
It’s seems the higher cards give best value as set builders race to undercut posted players. Heavyweights, flashbacks and Legends. 89-90s..
The 89 legends seem to be the best value right now. Something like ~55 coins per TP.
Since this is all new this year and I've seen a lot of players with fully powered up "Legends" for an example. Which way did you find cost efficient for getting training points for your players? Currently I'm dealing with a huge leap of about 1300 points right now and it's just to go up two tiers and I feel that's steep....Any advice will be greatly appreciated! Thanks in advance!