Your stat weights will vary a lot depending on your gear, but as a general guideline I would say:
Overall, just try to avoid Versatility, and if you have several Cold Steel, Hot Blood prioritise Crit even more.
Haste: speeds up your rotation, reduces the CD on your rotational spells, shortens the GCD and makes your auto attack hit more often. Your enrage still has the same duration though, so with high haste you will have higher enrage uptime.
Mastery (Mastery: Unshackled Fury): increases your damage while enraged.
Crit: makes all of your attacks have a chance to do double damage.
Versatility: increases the damage you do and reduces the damage you take.
The best thing is to always sim your own character since the stat priority changes depending on your gear and traits. If you don’t want to sim then just go for haste but keep mastery/crit not too far behind.
The best way to calculate stat priorities for your character is to "sim" your characterFind out how to sim
All of the races are close in DPS so don’t worry about it. But if you want to have the absolute best then sim your own character. It is close enough that not everyone will get the same result.
I recommend you to use what a sim tells you, but a likely setup would be:
Rings: 2x Enchant Ring - Accord of Critical Strike
Just go with what a sim tells you. The crit gem is called Deadly Lava Lazuli.
Potion: Potion of Unbridled Fury is the best potion for single target.
Flask: Greater flask of the Undertow is the strength flask.
Food: The critical strike food is called Mech-Dowel’s “Big Mech”.
Health Potion: Abyssal Healing Potion.
Rune: Battle-Scarred Augment Rune.