It doesnt matter if you learn 'card' or any other instant kill / easy win moves since you can simply choose to not use them. I never use items, which tons of people are used to relying on, and the only time I use 'card' is when I actually want to collect the cards for card mod. Another way to make it harder on yourself is to use the characters you perceive as the worst (though theyre all pretty good), and if you choose to use Zell or Irvine (or both) dont abuse Zells limit for 23947324 attacks per second with his looping limit combos (aka just go for hit-hit-big finish) while with Irvine dont use his ultimate ammo (pulse ammo I think was his best but not sure since never liked him so didnt use him). Also take your time lving weapons instead of farming for the materials to upgrade them. If you use Rinoa use her 'angel wing' limit (it can be INCREDIBLE, but it takes effort and setup to do so) instead of 'angelo,' which would leave out invincible moon.