Oh man, more and more just keep gettin' added to the Hajinmon crew. Welcome! lol There is tons of info I and a few others have posted in the Ayane sub-forums for DOA5U. Including my extensive combo video, combo discussion thread and my Ayane guide as well. I'm also always open to helping Ayane players out as well if need be.
Kasumi is also very solid. My expertise lies in Ayane (especially) and Genfu. My Kasumi knowledge (as far as playing her) is limited, so you may have to ask folks at the Kasumi forums for assistance on viability.
I recommend PANICITSTYLOR. Send him a message and say that I recommended him to you. He's a good kid and should be able to help you out with execution, etc.
Welcome, i see you re on PSN. So when you need help or questions you can come everytime, and of course when you need a Christie teacher my door is open for everyone who want learn the Queen of the Snake fist!