I find that trying to use tech A to counter tech B too limiting. Try to work on your strategy first instead of worrying about, if he throws this i have to do this, type of thinking. I don't know how the ridge hande is thrown but correct me if i'm wrong, it's a wide tech meaning it comes from the outside in a sweeping motion? Usually these techniques are secondary techs that need a set up to distract the opponent and open them up. When you're sparring try to engage your head movement and body movement. This will make it harder for your opponent to get a read on you.