If I remember, and unless they changed it, none of the jumps actually have any Z axis. so you will eat any aoe in your path that goes off. You can pretty much bet on it. The two skills can be used to negate knockback if you use it while you are in the effects of the knockback. I also think the skill Jump/High Jump puts you in two places simulatenously. So if you have an aoe at your start point and you jump at the boss, even though you are at the boss you will still take damage, and visa versa if you jump and the boss has an aoe around him you will take damage.