4th job Single Target DPS

o.O Well it should be accurate at long as you use the right formulas. Stil a 52luk should never be so much higher than 12atk. That makes all your comparison wrong doesn't it?

And could you please explain me why you times the mastery by 0.9?

x0.9 is in all minimum damage formulas except L7/TT and maybe the magic formula. (Mastery) * 0.9 is usually just simplified to save time with calculations (60% -> 54%, 80% -> 72%, and 90% -> 81%). L7 and TT always have 50% mastery, as the 0.9 is not in their min formulas, and the magic formula is so crazy that I can't remember off the top of my head if it's always 60% mastery at max for each skill or if it's 54% at max for each skill (after x0.9).