Im new at this game only 27 but I this the 5a is should be used only as AA at the last moment as they the end up in your face after they jump, You should probably be block untill then also try using 5c and 2c as AA's
That what I do at lest. I catch 2 5a's and follow up with a 5c into a 4D the rest is your imagination. Im not sure about 2a I think it AA in the corner after j.214b If they roll backwards