Hello
I think there should be a way for non war clan increase XP. When i'm in a clan, i'm representing that clan on my multiplayer/singleplayer attacks trough my CC.
You can implement something like:Multiplayer 1 Star win: 1XP to clan
Multiplayer 2 Star win: 2XP to clan
Multiplayer 3 Star win: 3XP to clan
Clan perks are very good to have, and people will always join a higher level clan.
Even a new war clan can boost their XP quickly at the start with this method.
Hope you enjoy this idea. Hope it's not a repost.
Thanks.