Oh look, it's a dain.

[Koen G]

1) dain is d' aui with an abbr. stroke and means dicit auicenna and in my opinion a key to the whole thing

The problem with what you propose, or with R.Sale's wild deer for that matter, is that it's not expandable to the rest of the writing system. It is easy to pick out a few convincing readings, but Voynichese has such un-languagelike structure that any effort to apply the chosen system to the whole thing is doomed to fail.

Let's say you are right and EVA:dain means "according to Avicenna", then this implies that paraphrases of Avicenna, i.e. actual linguistic information, is contained in the Voynichese following or preceding EVA:dain. But the structure of Voynichese words does not allow them to be read like that. It's the same with every system that tries to read Voynichese as relatively plainly written text: as soon as you choose a meaning for part of it, you will be unable to make sense of the rest.

For example, if we assume that EVA:a represents an actual "a", one immediately obvious problem is that in most languages, "a" can occur at the beginning and ending of a word. In both English and Latin, one of the most frequent positions of "a" is as the first letter of the word, and in Latin, word-final "a" is frequent as well. In EVA, word-final and word-initial "a" is a rarity. So then one has to come up with a solution for this, which would probably involve assuming EVA:y as a positional variant of EVA:a. This in turn leads to problems elsewhere, like the fact that you are reducing your already limited phoneme inventory.

What Marco said about numerals is also important, and I think the proportion of number-like glyphs in Voynichese is higher than what we would expect if Latin glyphs were chosen without a bias towards numerals.