Thanks for sharing this information about which cards to level up. I current have three summoners leveled up - Sloan, Obsidian, Tarsa. I am focusing leveling up the monster cards to 3/2/2/1 starting with the common cards since these are the ones that I can afford at this time. Once I get these three splinter's cards leveled up, do I level up on of the other splinter's summoners or do I level up one of these three summoners to the higher level? Thanks