Well… I have done Magic drop like 5 times. I find that it is easier to do when the rejection happens before the yo-yo lands on the string. What helps me get the rejection is forming a “7” with the “L”. I think what also helps the rejection happen is the way the string comes over my NTH (The distance, angle, or the height of the yo-yo before it drops).
Two other tricks that are giving me trouble are grinds (Throwhand grind) and whips (Iron whip)!