[Snowhawk]

The darkmoon card is definitely an upgrade over xiri's gift, you have plenty of crit to lose it. Will cost you typically around 2K gold for the Blessing's Deck, which you turn in for the card at the darkmoon faire. Also try to get the hex shrunken head and/or skull of guldan, both are obtainable at your guilds progression level and upgrades for both your trinkets.

I'm in a pretty good situation where I have plenty of badges and nothing to spend them on, so regemming with epics isn't an issue. Until you do get the belt, you may want to regem that belt. Throw a blue gem in that chest, you'll need it when you get that t6 belt. You'll probably keep the shoulders longer than the chest, but the extra 1 spell damage does help.

As for the neck, the correct neck you would upgrade to is the Gaurdians Pendant of Subjugation, not the vindicator neck. Throw a reckless pyrestone in it and you'll get +2 haste and +4 damage (dont forget the bonus stam). Costs nothing but honor and should hold you over until you get a TSN.

The rings you have are fine for now. If you did elect to swap one out, replace the hyjal ring for the mana attuned band.

For gems, I personally stick with reckless pyrestones (5 haste/6 damage) and runed crimsons (12 damage). Keep 2 gems for the chaotic requirement (forceful seaspray - 5 haste/7 stam). I used to go with the crit damage builds, but the amount of damage i'm able to put out over an entire fight increased by moving to a haste setup. With the 120 haste I have now, I'm sitting at 2200-2300 dps on brut, 15k dooms, and 9k sb crits.

One other thing that wasn't touched on, enchant your boots with boar's speed. Even minor speed will help on fights like brut when you have to run to burn zones, twins when you are targeted for conflag, or on m'uru when you have to avoid obstacles in phase 2.