At the moment of writing this (18 hours before rounds end) 5 teams had completed matches. The point of this analyses is to see which team used all of in-element cards(+nova) so that their supp team defence will be gimped
Darkness: nightfall, parasite, vampire, voodoo, cloack (USED nova)
Gravity: Grav mercenary,drag, fire eater, chimera +nova
Fire: ash eater, drag, fire spirit, fire shield, RoF +nova
Death: virus, vulture, skeleton, boneyard,plague, aflatoxin, deathstalker + nova
light: drag, peggy, photon, holy light, solar shield, reflect shield, lucipherin, hope (used nova)
Problem is that gravity going to get swarmed, so attacking them might backfire. Fire can build half decent decks with those cards. Light got a hard hitter and a peggy along with shields to build decks, not a weakling. So the real candidates are death and darkness for the time being. I would lean towards darkness mostly because of rainbow not available