Saw on the xbox360a board you're going for the 100 wins at survival. I know you get an achievement for playing it for the first time (5G) and when you reach 50 wins (35G). Works for the Default as well as the Custom Drama.
Could you let me know if there are much changes when you progress (more difficulty, regain lesser health, etc.). It seems you regain health based on your fight performance (ranking), even though you don't see it, not sure about this though.
Anyway, have fun going for the 100. Probabaly some online secret achievements too. Luckily I just started playing online