/invade
as far as clan war i was thinking it happens over a week 2 player who fight can organise times among themselves and post who won that way all get a chance so in all a certain amount of battles like nyster said 7 sounds good and after 1 week and all batlles we can see the winning clan
7 wicked vs 7 Demonic
3 mods (if ends in draw replay mod also players in battle can agree on any mods) between each player who ever wins most gains 1 point for there team
the clan with least points pays 10k to the winner
if u agree set a time and we will start the clock