puqwI' law' law' wa'maH law' puS seems like nonsense to me: ??My children are many, the abstract number ten is few. You are literally comparing apples and oranges, and I don't think it works.
I'm surprised you find this construction so unobvious. It seems unequivocally correct to me. Maybe it would help to point out that
wa'maH doesn't have to be interpreted as
the abstract number ten here.
Numbers are used as nouns. As such, they may stand alone as subjects or objects or they may modify another noun. (page 54)
For example, when Captain Kruge says
wa' yIHoH kill one to his lieutenant on the Genesis Planet, he isn't ordering the death of an abstract number. The
my children are more numerous than ten phrasing works the same way.
Using the same pattern, "I have the most children" is actually a comparision between you and everyone else.
In my mind,
A Q law' Hoch Q puS is just a formula without a straightforward literal translation. It can't actually be a comparison between
A and everything, because "everything"
includes A. However, there isn't a reference to "everything
else" in the words either. It's just an oddball bit of grammar that carries the superlative meaning.