Menelaus

Does Attack reduce the chance of getting a blue "0" hit?

Hey, I'm at 51 Attack, Defense, and Hits. My Strength is 34. What's the most effective for combat? Attack or Strength? I used to level all three stats at the same time, but they got rid of that option didn't they? Is it better to level Strength high before leveling attack, or is it better to try to keep all three even? I don't really PvP much.