OK, not sure how to vault over, and I don't seem to be able to use the grapple gun on people yet, so I forgive myself those two. Been using the rest though. Trying to keep up with the direction of the strike is tricky at times, lost my combo doing that. Switching between grab trigger and index trigger has confused me a couple of times too, ended up cape stunning when I meant to batarang etc. Just a matter of getting used to it, soon as I get a combat challenge open I'll be working on it.
Enjoying it so far though! Just had my first death in the first stealth room, got shot to pieces when I thought I was safe. Playing on hardest difficulty so I die quick! Second time round I just blitzed them, sod stealth, smoke bomb and beat them up.