I think that there should be an option of gaining gems from successful raid. I don't want to say that it should be got as loot but from the supercell server.
Let us consider as an example that a player has 13 consecutive successful raid. Then he should be rewarded 1 gem for every 2 successful raid above 5 wins. In this way, he should get 4 gems. This will make the players more prone to clashing !!
