nice post

the exception to rule 1 is tournaments. It may be desirable in some cases to help the short stack; for example if you have a large chip lead and want to preserve the bubble to bully your opponents

as for point 3, I would suggest "going south" if winning a pot puts you in an unfamiliar situation or at positional disadvantage. i.e. if you double up with 150 bbs and the player on your left has 600 bbs and is a competent aggressive player then you certainly don't want to muck around.