I see many people confused over what stat does what so to try help clear the matter up I decided to ask Jamie for a basic guide.
Damage: Is affected by your Attack(or Magic), Skill, Luck, Speed and your Level against the Defense(or Resistance) of your target. Attack(or Magic) and Level are the major players though.
Dodging(Or Resisting): Is mostly based on your Speed as well as some Skill and Luck against the Speed, Skill and Luck of your target.
Criticals: Are based on your Luck and Level against your target’s Luck and Level. (Yes, enemies have levels.)
Skills: (Jamie wasn’t entirely clear on this as I have a problem with some of what he said) Are affected by the skill’s base value (eg Savage’s Gator Aid III base is 2500) as well as your Skill and Luck.
Remember: Speed does not affect your Attack Rate!
I’ll update this if I get more information.