At this point a lot of guilds are moving into the Firelands. Lets look at the gear that Assassination rogues should be looking out for. This list is for non-heroic Firelands raiding.
Head
Your top item is the T12 Dark Phoenix Helmet. That comes from a token that drops from Ragnaros. While you work your way to Ragnaros you can get the Hood of Rampant Disdain from Lord Rhyolith. Depending on your other gear, this may even be better than the T12 helm due to its red socket. The best pre-Firelands item is the T11 Wind Dancer’s Helmet which comes from Nefarian in BWD.
Neck
The Choker of the Vanquished Lord is another Ragnaros drop. Other than that, you can easily get the Necklace of Smoke Signals for the low, low price of 1250 Valor Points. The top pre-Firlands choice is the Necklace of Strife from the double dragons in BoT.
Shoulders
The top item is the T12 Dark Phoenix Spaulders which you get from a token that comes from Majordomo Staghelm. Also in the Firelands are the Shoulderpads of the Forgotten Gate which drop from Baleroc. Your top pre-Firelands option are the Poison Protocol Pauldrons from the Omnotron Defense System in BWD.
Back
The BiS right now is the Dreadfire Drape that comes from Lord Rhyolith. After that is the Sleek Flamewrath Cloak which you get for being friendly with the Avengers of Hyjal faction – basically two or three trash clears. Everyone should have an epic cloak going into Firelands, because you can get the Mantle of Doubt just from doing the Thrall questline in Hyjal.
Chest
The top item in this slot is the Breastplate of the Incendiary Soul that drops from Baleroc. It surpasses the T12 chest piece Dark Phoenix Tunic (bought with 2200 Valor Points) due to superior itemization for assassination spec. Of course, you would take the T12 chest if it gave you the set bonus. Your best pre-Firelands option is the T11 Wind Dancer’s Tunic which can now be purchased with Justice Points.
Wrist
This slot is always tough to fill. In the Firelands, Alysrazor drops randomly enchanted Flickering Wristband. You are looking for Stormblast, Zephyr, Windstorm, or Windflurry. Depending on your other gear, any of those four would likely be slightly better than the next wrist option which is the Flamebinder Bracers, bought for 1250 Valor Points. Your best pre-Firelands item is the Parasitic Bands from Magmaw in BWD.
Hands
You can look around for the top item – the Clutches of Evil. Good luck finding it. It is a crafted leatherworking item made with a pattern that drops in the Firelands. A lot of LW picked that up in the first week after patch 4.2 when the drop rate was sky-high. The recipe does no good without the four Living Embers needed for the craft, and those have been very scarce. Your next option is the Gloves of Dissolving Smoke from Shannox. Those are slightly better than the T12 Dark Phoenix Gloves, bought with 1650 Valor Points, due to superior itemization. If you’ve been doing your Molten Front quests you can get Aviana’s Grips once you unlock the Calling the Ancients. The top pre-Firlands item is the T11 Wind Dancer’s Gloves, purchasable with Justice Points.
Belt
This is an easy one, even though there are not many options. You can get the Flamebinding Girdle once you hit Honored with the Avengers of Hyjal faction, which should be after just a handful of Firelands runs even if you’re only killing trash. If you’re extremely lucky or have a lot of gold, you can get the BoE Riplimb’s Lost Collar, which is a Firelands trash drop. Other than those options, you would go back to the leatherworking crafted Belt of Nefarious Whispers.
Legs
Very early in Firelands you can get the Cinderweb Leggings from the red widow Beth’tilac. This are likely slightly better than the T12 Dark Phoenix Legguards due to their itemization. If you don’t get the Beth’tilac drop, the tier legs can be bought with 2200 Valor Points. That’s all at the T12 level. The best pre-T12 item is the Wind Dancer’s Legguards, which can be bought using Justice Points.
Feet
Like the gloves, the best piece here is a crafted item that you will have a hard time finding. The Treads of the Craft require four Living Embers and those are not easy to find. After that, look for the Sandals of Leaping Coals from Majordomo Staghelm. Until your guild gets that far in the Firelands, there are not any options better than the old Storm Rider’s Boots from Halfus Wyrmbreaker in BoT.
Ring
When you eventually get to Exalted with the Avengers of Hyjal, you can get the best ring which is the Viridian Signet of the Avengers. For most of us, that will take a long time to achieve. Until then you can look for the Widow’s Kiss from Beth’tilac, or you can buy the Splintered Brimstone Seal for 1250 Valor Points. Your other good rings will come from quests, so everyone should get them. You get Matoclaw’s Band from the Molten Front quests after only one day of questing. You can also get the Band of Glittering Lights from finishing the Filling the Moonwell quest. Those last two are not huge upgrades (if at all) over the previous tier’s epic rings, such as the Hornet Sting Band or the Signet of the Elder Council.
Trinket
We can all drool over the Matrix Restabilizer, but you’ll have to kill Ragnaros to have a shot at it. And, like all trinkets, rings, and neck items, you’ll have to out-roll hunters and feral druids for it. After that, our old friend Fluid Death still holds up as a top option for the trinket slot, and you can get it for Justice Points now. Look for The Hungerer as your next-best option when you kill Majordomo Staghelm. You can buy the Ancient Petrified Seed when you get to Revered with the Avengers of Hyjal faction, but that’s not too much of an upgrade over old favorites like heroic Tia’s Grace (from Lost City).
Main Hand Dagger
There aretwo slow daggers that drop in Firelands and they are pretty similar. They are Avool’s Incendiary Dagger, which can drop from any Firelands boss, and Feeding Frenzy from Shannox. If you’ve got some gold you can buy Brainsplinter, which is crafted by blacksmiths who have the pattern from Firelands trash. It doesn’t require any hard-to-find mats so it won’t be outrageously expensive. Your best pre-T12 option is the Organic Lifeform Inverter from Omnotron Defense System in BWD.
Off Hand Dagger
There are two good fast daggers that drop in the Firelands. Alysra’s Razor (from Alysrazor) is the best due to its gem socket. Also good is the Entrail Disgorger that drops from Lord Rhyolith. Pre-Firelands, you can buy Scaleslicer from the auction house (it drops randomly from pickpocketing, so don’t try and farm it) or you can get Uhn’agh Fash, the Darkest Betrayal from Cho’gall in BoT.
Ranged
For pure itemization, the bow Arathar, the Eye of Flame from Ragnaros is our top option. However, its not a thrown weapon, and if you roll on that all the hunters in the world will come to your house and kill your cat. What rogues are looking for is the Morningstar Shard, for only 700 Valor Points. As an alternative, for a few thousand gold you can usually find Spinerender on the auction house. Its a random drop from pickpocketing.