Haha, I'll be practicing as both still. I've only just started using Lambda today so I have no idea how I should use her against certain people (Makoto, I'm looking at you!!), so with Noel I *kinda* know how to play people.
Awww D: I understand what you mean though, it's always very hard to win in ranked :/ I probably can't help you with those, but I can help you get as many other achievements as I can like the player matches!
Ah yes, although I don't need Mvc3 myself anymore (besides the 5 ranked matches one) I am honestly hopeless when it comes to Blazblue..can't even win a single ranked match as hard as I try, everyone is just way too good for me. xD