You could just set a macro to replace certain colours.. making sure facial colour isnt disturbed....
Replace colour option is pretty handing if u select the right ones.. Would have to spend some time on getting the colours right on the first one ...But you can record that via macro and then just speed it up .. You would have to pick and set colours via keyboard other wise the mouse would click on the wrong area's giving you the wrong colour.
some colours on armours are the same colour as whats on the skin.
so if you do that even if it has no feathering it still changes colourso n the head. it does with this armour, crystal armour(if you try and colour the tail bits) and other armours.
so literally the only way in photoshop is having the head change colour unless you go through all the images manually.
and thers no need for actual macros in photoshop. just record the action, which yes. is a macro. but people seem to be implying they use a seperate program to record the macro. it takes 2 mins for it to go through all the images and you can do other stuff while its doing it.