there's one thing that miffs me about this model.. it's is made from a default villager and has no ninja-like anim, except what you did yourself.. why don't you try transferring some demon hunter animations to it? retera's matrix eater can do that (it can put one model into the other, but you can control what you want added, so you can just set it to use existing bones for animations and import only them)
(also, matrix eater uses mdl format, so you'd need to use mdlx converter)