um..... okay.
Since you haven't responded to the reasoning I just gave, I'm guessing you agree with me that rasengan's shape manipulation must be > chidori's due to chidori being equal to rasengan yet having spacial manipulation and elemental transformation.
Look kakashi even says that he was unable to combine his elemental transformation with rasengan's spacial manipulation:
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Yet kakashi is capable of using raikiri, the S-ranked version of Chidori which is an A rank. That tells you that raikiri and chidori both have much lower leveled shape manipulation than rasengan since kakashi was able to develop those two but failed to make a raiton rasengan.