My thoughts would be we either (a) omit them from the draft, and everyone keeps one set of minifigs, or (b) we draft them, part by part, just like everything else. Thus, if you really want Legolas, you’d use 5 picks to get him (including bow, hair, head, torso, legs…)
But then, I’ve never done a parts draft… maybe Tim can let us know what he’s done in the past.