Set a list of requirements / rules
Like donations , attack in cw , listen to leader&co instructions , and etc
if any of these is breaks the user will be kicked without any chances
On prep day make sure all clan war base is donated ask someone to donate like a duty rooster for who's going to donate this time
Also a well planned war use the first attack when the war starts and the 2nd attack for clean up
Ugh idk what to type my clan use to start with 3 people then next week filled with 30+ members and had to kick some noobs
Btw kick those who break the rules no matter if hes your friend or gf

if he wants to request back he has to make a promise and observe him for a while