Pitch Accent of 何にも

Question

I'm trying to understand the pitch of the sentence fragment

それであたし何にもしてないのに...

In particular "何にも" is giving me trouble. When I enter this word into OJAD, it shows as Atamadaka:

But dictionaries are reporting it as all sorts of things:

Moreover, it looks like the reading of "何" from "何にも" can be either なん (slang?) or なに. If the latter, the pitch changes again?

Finally, is "何にも" distinct from 何 + に + も? If not, an accepted pronuncation of 何 seems to be "naNI" (Heiban), so wouldn't a third acceptable pronuncation be "naNINImo", since the first particle would raise (since 何 is being treated as Heiban), and the second particle would lower (since second successive particles lower, as a rule)?

Answer 1

At least when 何にも is used as a negative polarity item (which is almost always the case), it is always pronounced as heiban (なんにも【LHHH】/なににも【LHHH】). That result from OJAC seems confusing to me.

See also: The pitch accent of なんの意味もない

But なににも【HLLL】 may appear in rare cases where it is used as an equivalent of 何にでも/何に対しても (e.g., なににも【HLLL】使えるソース "sauce you can use for whatever/everything").