First: I got an answer from Karyu Amawey concerning the stress-marks in his IPA-transcript. As far as I understood he inserted them after listening to the film several times by choice. (But a lot of the vocabulary never was in the dialogues of the film.) So I suppose, that the stress-marks rely in many cases just on guessing.
Second: I've noticed two things I wanted to know.
(1) The word ’ampi is marked as a "vtr" (transitive verb) [by the way: the "tr" seems to be not in the list of abbreviations] in your dictionary. I suppose you did so, because Karyu Amawey marked it as a "v" (verb) in his Pocket guide, right? But ... how do you both know, that ’ampi really is the verb (to touch) and not the noun (a touch)? In the Survival guide (as far as I see the primary source of all the other offspins) there are NO hints, to what part of speech a single word belongs to; it has just the Na'vi-word and an english equivalent, without any further information. And since in the English language different parts of speech (noun, verb, adjective, ...) often share the same word, it's IMHO nearly impossible to know, what is meant, if there is no context. The same thing e. g. about ’e’al ... you both name it an adjective ("the worst case"), but may it not (also) be an adverb ("the children suffered worst")? I didn't spent time to get much more examples, but I think it wouldn't be a problem to find more of such words. So my question: How can you be sure, that you really know, to what part of speech these words belong to?
(2) The IPA-transcript not only contains stress-marks (very questionable ones as shown above), but also dots, which indicate, where a single syllable ends and the next begins. This also is in some cases quite tricky, since I suppose, that these dots were set just by making (more or less plausible) guessings. As for an example: tìfmetok has the dots as: tìf.me.tok. But how do you know, that it's not tì.fme.tok or maybe even tì.fmet.ok? (According to Frommers rules about syllables that also would be possible.) Especially in verbs, where you have to know the syllable-borders in order to insert the infixes correctly, that point could become relevant. So my question: How do you know the correct syllable-borders in words, when there are more than one possibilities?