Hey man, welcome to the Siegfried soul arena - to keep moves clear, we use notations here rather than names just so nobody gets confused - if you don't know the notation, I really recommend learning it.
As for your question, by 'Spinning phantom combo, I assume you mean A+Ka2AA? (The three hit version that skips the high straight into the two lows?)
Anyway, the timing is crucial for this move, I consider it almost a just frame, if it isn't technically one. While I could try to explain it, I personally find examples to be more useful than written word, so I will make a video to teach you how to do it.
On a side note - Why do we not have a Questions and Answers thread?!?! XD
I'm going to make one when I upload the video later today and put it in their for you, so we can merge all questions and make the soul arena a little tidier XD
Untill then, thread locked.
Oh, and if you have any other questions, just shoot me or Slayer_X64 a PM, we'll both be happy to help you out. =)