not very caught up on smash terms.
i do know fair, bair, dair, uair, and spike.
oops; i'll try to explain some things.
b-reverse is where you are facing one direction, press b and move the control stick to the other direction to perform an instant turnaround. it flips your horizontal momentum.
so you can cancel aura sphere (neutral b) by pressing shield, and you can act out of shield almost immediately by jumping.
in this case, you would want to attack them; jump cancel upsmash is where you jump but immediately upsmash
since i use a GC controller, I press X/Y to initiate the sequence, then push up and A to do the JCUS
(curses i've been ninja'd)