The fact is that whenever you attempt to use a Spark vs. Wings, it just doesn't work. If you mouse over a Spark, one of the Passive Skills should be airborne. If you have Sparks and attempt to surpass Wings, you will get a depressing "miss".
Lately, I've been testing Sparks with Mitosis (just incase that has something to do with it) and that might affect it a little (it being new and all).
EDIT: Added picture
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