I actually cheated in the Carta Hard mode. I can do Easy and Normal, but I just couldn't do Hard even when I did it at 25 carta.
So what did I do? I took a picture and abused the heck of pause. So when they call out the beginning of the card, I immediately pause so I can check the picture to see where I go.
Well worth it though. Cheria in ponytail is nice change of pace.
Kurt for me was impossible to do in Hard under 60sec. Stupid reinforcements... pretty decent hp which means you can't focus them down quick enough, and if you ignore them they interrupt combos. So I had to beat him in moderate for the 60s title.
Oh well at least I gave him a good (if slow) beating in Chaos.
As for mastering titles, I dunno, I don't really have a problem with it. But then again, Chaos mode gives SP like theres no tomorrow, as pretty much everyone in my main party had the third Mastery title before I got the shuttle.