User blog comment:Zaiku K/The Next Dolls: Only Optimized for One Major Battle?/@comment-24199138-20140906032627

I agree with all your points above. However during the event of the Ivory Towers, the fours Next Dolls were assigned (precise location) to defend the position their respective counter-part were heading. This could mean that Promenstein somehow known about Tamamo's plan beforehand and made sure that the Next Dolls are not to fight any other Heavenly Knights / Powerful Threats unless they were its counter-part. If a situation like that arised, Promestein probably programmed the ND to retreat ASAP (as seen numerous time before) or in Ivory Tower's case: Send in the appropriate ND as reinforcement maybe?

Yeah, nevertheless, in an all out-brawl between the ND & HK, the HK would have the edge. This is mainly because Amphisbaena was not an enchanced version of Erubetie, rather a simple counter. This means her battle skills would not have the same advantage Erubetie would have over Hainuwele for example.