my elder bro plays a mean ragna, and does really well here at town. He told me to Jump away from his pressure when he's open if not find a higher priority move then his. This advice actually worked for me... now i have WAY less trouble against ragnas. This has been stated before, I forget where and who said it but they said that if ragnas rushdown is really good(Don't even know if that's proper grammer) use 2c carefully to lay off some pressure.