Actually, I'd go with Susanoo Chidori.
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Indra's Arrow wouldn't count for mesince its not something he can readily use, he needs the Bijuu's aid for him to pull it off, and that's something beyond him in a normal fight, something like Susanoo Shinra Tensei is nothing more than fanfic since we haven't even seen him use the normal variation let alone a Susanoo powered version and Chibaku Tensei, while powerful, was cut down by a PS sword within moments, and that was when JJ Madara was casting those. So therefore, by process of elimination, Perfect Susanoo Chidori wins.