Gloss “ambë” by Eldamo Import

So how can one say "more than ... "? Is that amba lá? Or maybe it is already ambela? Or anything else??

According the Ardalambion Quenya course:

Lá is also a preposition "beyond", and as such it is used in phrases having to do with comparison: VT42:32 cites the formula "A ná calima lá B" for "A is brighter than B" (literally "A is bright beyond B" – notice that the adjective calima "bright" appears in its simplest form, with no ending corresponding to the -er of "brighter").

From what I saw and IIRC, ambë can be used for comparison, but I'm not sure how.

Your question has got me thinking and I have started a discussion on it over on G+ - I will post whatever conclusion we come to here, but of course you are also welcome to follow it there: plus.google.com