Board Thread:Game Discussion/@comment-77.252.157.163-20130824182127/@comment-16704309-20130828093632

Beast way which worked for me to get lvl 21:

Fight with your strongest 2 champions and 2 strong friends. Wait for 1.5 hour and fight again with your strongest champion and 2 strong friends. This way you will have maximum use of energy combined with friends.

Have you got 2 or 3 friends with nemesis and not 4? First fight with your 3 strongest champions and 2 friends with nemesis. After 1.5 hour, fight again with your strongest champion and a strong friend, for maximum use of energy combined with nemesis friends.

Have you got 4 nemesis friends, You should just do the first way, but then with nemesis friends