Thanks for the answer!
I did many simulation with my gear (+/-495) and all the time simcraft show me Crit>Haste>Mastery in single target figths with GoSup. If I force Haste==Mastery>Crit, I got a little dps loss (< 3%). I will do Throne of Thunder today with Haste==Mastery>Crit to test like you suggested, because I think it will be better to attack 2 or more targets. Later, I will give my feedback to you!