A clan chat would be a nice way to create some strategies. And i think being in a clan should have a advantage beside being able doing clan war. maybe if clans members donate 10k then the clan members would get 5% health, 20k for 10% health and so on.
I really think there should be a clan chat. Like a player can leave a comment any time and other clan members can replay or add new comments. This would really help a clan make decisions easier and clans can make plans.