For combos I have to bounce them off a wall or the ground for it to work, sometimes I can get an open space combo but its rare. Im practicing teleporting REALLY fast past them then truning aorund and hitting the other way. Its possible, but hard to do.
Anyway, my combo is usually smack into the ground when they are close to the ground, then swoop and hit or tele and hit them up, teleport up while looking down until I am above them then smack them down again. By then I am out of ki if I am normal, but if I am transed I either turn off fly and hit teleport until I am even with them and smack them straight, or I charge a big beam and finish them off.