I use both. The EX may be useless in the middle of the fight but it's a real life saver if both you and the other player have a little bit life left. Kan't tell you how many times it saved my ass. And there is sooooo many ways to connect a X-Ray but my favorite is J+2 2 1 3 3 3 X-Ray...bicycle kick. It's the most easiest one and it takes up a lot of damage, 44%.