Currently, if you defeat all your opponents in the Attack tab, you get a whole 2 Sands of War.
How about giving the player something else in addition?
eg:
2 SoW + 2 Ironite + 2 Iron Coins
This would definitely be a more useful motivation than just 2 SoW.
Even just 2 Ironite in addition to the SoW would be nice.
At the moment that carrot on the end of the stick for completing defeating all the teams in the Attack tab is a pretty small carrot. No need to make the reward excessive, but an improvement would be nice.