I have two teams
Very brutal, gains a lot of attack off double courage with every skull match. BD cast just melts the opponent. In a pinch Justice/Courage can feed each other by matching red/blue. However, a salad dragon can bring it to a halt and a missfire of a guardian can be very damaging.
Slower but more solid. Red/Yellow to Blue, Blue/Green to Purple, Purple fires Mab when lots of Blue and Kraken for damage and devour. All while Kraken's 3rd trait erodes health with every extra turn. 1st turn wins not uncommon. Impervious heavy teams slow it down with immunity to Mab and devour, but Kraken damage still works well. If Kraken dies (bad luck death touch or Bone Dragon cast), Spider can put up buffer swarms while Mab AEs to win.