Hmm, oddly enough I was thinking of doing an army of Chimu/Moche but gave up when I couldn't find any figure sources, so I'm glad to see someone's considering making them!
Have you ever seen those little wooden tools for dispensing runny honey (they are the sort of thing you can buy in National Trust gift shops). The weapon he is wielding looks exactly like one of those. Perhaps he is part of the Mochito Catering Corps?