1 troops
・ ratio of taking and donating troops is about 3:1
・ you can donate whatever troops you want, except giants, wall breakers, healers and goblins.
・ you can't ask for specific troops, except the time of clan war and revenge attacks , or some other reasons.

2 clan war
・ keep " ±10 rule"
----example: when you are #20 in clan war map, you should attack enemies from #10 to #30.
-----------------when you are #25, you should attack enemies from #15 to #35.
・ after 16 hours, you can ignore the rule and you can attack anyone.