Meta for Incas?

Ok so one of the few civs that I'm still pretty clueless with whenever I get them is Incas. Their bonuses are pretty useful for early game (free llama and houses give 10 pop) but they don't really have anything for late game apart from villagers being more resistant to raiding.

In terms of military they don't seem to shine in anything in particular and their eagles are far inferior to the Aztec and Mayan ones...

So really I'm just wondering what is the preferred strategy for incas as a flank and pocket, on say, Arabia. And as a pocket should I still go for eagles as a replacement for knights or something else?

Cheers