And I guess WO3 Chaos could be too much for you if you are not controlling OP character like Orochi and X, or Xiahou Ba since you will pretty much die a like a MF if you tried something unnecessary in 8 stars or above. Have fun with running peons.
Not surprised that your fingers hurt. Mine hurt after only an hour of the demo as much as they did after a Bloody Palace run with Nero in DMC4. Maybe it was because I wasn't used to the control scheme, but still, my hands don't normally take such a beating from any other non-shmup game.
Dude, i not gonna be badass but i have to be frank here. if you have any difficulties getting SSS rank in such a pathetically easy game, you ought to stay away from the HnS genre seriously. Just a reality check really.