man... didn't dacidbro beat you up at evo
EDIT: matchup wise think you should save your nails more... instead of using them for blockstrings, try using 6A/5B to reset your pressure. arakune has a super fast jump, sooo 5C if you think they will try. arakune players have a really bad habit of always 5Ding after 6A (their overhead) so if you ib the 6A you get free 5A, if you don't iB you should just go with 6D and maybe 2D (not sure, can't test) and teleport. Also when you go for 2D anti air, and you guardpoint his attacks don't go for teleports, your much more likely to hit him if you stay in place.
Ashura is actually minus on hit so you SHOULD block, unless you are sure they are going to hit a button, and then you would just ashura again. Don't waste meter on air supercrash shenanigans, they usually don't work out. I also use A nail to snipe bell bug if i "NEED" to get in, so just another random thought.