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Gotcha. This is a total guess, but I'd venture to say that PageRank is probably passed in the same quantities (mozRank definitely is). Page Authority is harder to say because it doesn't actually "flow" - it's a metric we calculate AFTER the rest of the link graph and the metrics are done processing and represents a machine-learning based algo with inputs of every other kind of link metric. One of these could certainly be the ratio of images to text links or the existence or non-existence of both, but as with any machine learning system, it's hard to know what's actually (even for the folks who wrote it!)!

I would be worried that the js links are using linkjuice but not delivering it to the page, it may be evaperating As for link sculpting, linksculpting with no-follow is dead, but you shoudl be worried where your link jucie flows. using the flat linking structure as rank has bloged about is the best mathmaticly, but you need to also consider users.