They haven't issued all episodes of Inuyasha in my country, so I don't remember seeing the adamant barrier.
I think my favorite is the Kaze no Kizu (Wound of the wind - I believe this is the English translation)
well i also do like adamant barrage since he can use it anytime he wants unlike the back lash wave. though windscar is great, there are times he fails destroying enemies with it.
