Ok 
Me and your clone are standing 5 meters from each other.
I start out with gathering chakra in my stomach and then converting it into katon chakra.When I finnish with molding and gathering chakra I start to channel it towards my mouth.In the period of channeling chakra through my lungs I super heat it up.As I channel chakra towards my mouth I take 6 kunais,3 with my right hand and 3 with my left hand.As chakra comes to my mouth I push it just a little bit forward to my lips and use nature manipulation to create fire out of it and shape manipulation to create like a fireball look. As I release small fireball I also trow shuriken in direction of fireball,ignited them with fire.As I trow ignited shuriken first towards the firball and then towards your clone,your clone starts releasing multiply mudshots in direction of my shurikens. As shurikens slash with mudshot(which are much smaller) they will just go trough the mudshot and continue flying towards your clone and when hitting your clone,your clone will dissapear
-I think that your counter is not going to work,although there are multiply mudshots there size is much smaller and shurikens are inflamed with fire,which is not going to stop burning.(although I am not sure about this)
-I would rate it as fast technique to be preformed you create fireball and trow shurikens at the fireball..
-It is a technique that can be used up to mid range.
-By inflaming shurikens with fire your prevent them from stopping fast as well as making them much stronger.
-Shurikens are going to continue to burn on impact.
-About disadvatntages I would say only that you need shurikens to preform it..
-If used in conjection with wind technique it can be lethal.
Me and your clone are standing 5 meters from each other.
I start out with gathering chakra in my stomach and then converting it into katon chakra.When I finnish with molding and gathering chakra I start to channel it towards my mouth.In the period of channeling chakra through my lungs I super heat it up.As I channel chakra towards my mouth I take 6 kunais,3 with my right hand and 3 with my left hand.As chakra comes to my mouth I push it just a little bit forward to my lips and use nature manipulation to create fire out of it and shape manipulation to create like a fireball look. As I release small fireball I also trow shuriken in direction of fireball,ignited them with fire.As I trow ignited shuriken first towards the firball and then towards your clone,your clone starts releasing multiply mudshots in direction of my shurikens. As shurikens slash with mudshot(which are much smaller) they will just go trough the mudshot and continue flying towards your clone and when hitting your clone,your clone will dissapear
-I think that your counter is not going to work,although there are multiply mudshots there size is much smaller and shurikens are inflamed with fire,which is not going to stop burning.(although I am not sure about this)
-I would rate it as fast technique to be preformed you create fireball and trow shurikens at the fireball..
-It is a technique that can be used up to mid range.
-By inflaming shurikens with fire your prevent them from stopping fast as well as making them much stronger.
-Shurikens are going to continue to burn on impact.
-About disadvatntages I would say only that you need shurikens to preform it..
-If used in conjection with wind technique it can be lethal.