Board Thread:Questions and Answers/@comment-25121028-20140710192448/@comment-25171183-20140712171900

It depends on which event you are focusing on.

For towerclimbing, attack spirit shall be high enough to at least 1x attack with your best attack team. The higher Health the better. And you do not need to defend in towerclimbing, 15point is enough.

For conquest, solo or guild, attack:defence=1:2,  and attack spirit shall be enough for at least 3 times 10 card attack.