MAS>Glide? or Glide>MAS? Which one activates after the jumps?
Multi-Air Slide and then Glide.
I personally equip Omni Air Dash and forego the use of Multi-Air Slide with Kuja all together.
Same I use omni for all my characters, Jumping and falling is all ya need for vertical moving
Oh, I guess I should mention, you'll go directly into Glide after a single jump if you hold the X, so you could, say, go:
Jump -> Jump (Hold) -> Glide -> X for Multi Air Slide -> Glide
But yeah, if you press X again after the last jump, it will be MAS, and if you hold, it's Glide and then MAS.