Alright, some of these may or may not have been answered already, but I'm just going to ask anyway because honestly using this website's search system is a pain.
Question 1: ZSS's A-combo--except for a few characters like G&W--is absolutely useless, isn't it? I read suggestions to do a jab, jab cancel, and a tilt, but even then your opponent can still shield the tilt and punish you if they're a decent player. So the only use for it that I can see is if your opponent is too fast and up in your face that you can't retaliate with a tilt, so you A-combo your first two jabs and then roll/jump away to get spacing.
Question 2: Dsmash Dsmash Up+B. It's never a guaranteed combo, is it? I've tried it on my friend at every percent, and he can just DI to the left or right easily. I barely even try it anymore--I just lead into a fair or bair instead.
Question 3: Is there a set chance that ZSS's ftilt will trip her opponent? Do the angles make a difference (in trip %, not damage or knockback)?