I've found out that 236A is a pretty bad 'pressure' move, especially if the opponent has a SRK.
I've learnt from experience in the past where I'd scratch at least 4 to 7 times. During these time, it all seemed to work with opponents who are new at this game.
One day, ONE DAY, this Jin user IB'd my 4th scratch into a Arrow Of Ice. From then on, I've stopped scratching more than 3 times.
If they have barrier guard, it's highly unlikely u'd get to continue pressuring them.
5C or 2B after a few scratches works quite well for most of the cast.
I only continue to scratch them if they burst and my first scratch connects.