1) This is a thread for Ragna players to ask about how to improve their Ragna play. Questions like that should go in the Hakumen section of the forums in the vs. Ragna matchup thread.
2) You're not blocking, so it doesn't really matter if you know where the holes are anyway. But if you must know:
2A>2C
2A(IB)>2B
2B(IB)>2C
2B>5C
2C>anything that's not 5C
5C (IB)>2D
Anything > Dead Spike
Dead Spike > anything
That's all I can think of on the top of my head. There are a lot of them.
Don't mash D.