Warrior Tanking. As it is right now we are the hardest class for grabbing and maintaining threat generation. I will be going over my current build and my current stat priorities for the rest of the warrior tanks in the guild.
Going over stats before my build. I currently have 58.50% resist all, 58.80% resist physical. Those aren't 100% accurate, but pretty close to 99% accurate. This is because I dropped the Fortify Amp, or else it would look more like 63.7% resist all.
I value the stats as something like Armor < Health < Tech < Insight < Grit < Strikethrough.
You want your health and armor high, so you can take a beating. This is fairly standard. A lot of warriors I've seen have gone for health above everything else. They have about 50k health. They also have around 48% resist all. This is bad, because they will take my damage, even though they have a greater health pool to deplete, to borrow Ultradingers' words, the heals aren't percentage based. It's better to take less damage total, and have slightly less health. I'd suggest around 37k+ health with enough armor to get you to at least 56% resist all out of combat.
Tech. This is new to us, based on the new changes, and the upcoming changes. Previously, I would have said to dump all your tech, because you can hold threat just find with 1100 support power. I did all my silvers with that much support power. I only ever had threat problems in rare situations, such as stunned and couldn't attack boss, or was in any position where I can't attack the boss, and the dps can. This can still happen even now. It's based on shitty fights for us to tank. They are rare, and few, but they exist. Until threat gets to the point where you can snap threat a masssssssiiiive lead, you will have to have your dps careful on this situations. Anyway. Since the new changes have actually made support power favorable, you want Tech now. I'd dump Insight for Tech if you are above 10.33% deflect critical. There is no point where you no longer want Tech. This is a good stats forever basically, as I don't see us being able to get to 1499 Tech anytime soon. Get your support power as high as possible, without gimping your other stats. I currently have 1300. I want 1600+.
Insight is good for getting to Deflect Critical Cap. After that, you only want it on an item, if the other stat priorities are already met, you may pick it up for that slightly extra chance at deflecting. Once you have about 60% resist all, and 39k hp or so, any deflect is basically just a bonus, because you take pretty consistent damage already, so deflects aren't relied upon, therefore you aren't as spiky, so when you get them, they are cute and nice and fun, when you don't, no one cares.
The AMPS! THE BUILDS!
I have 3 extra amp points. If you don't, I'd take 1 away from assault power, and 2 away from deflect, OR 1 away from deflect and 1 from shield capacity. It's your call. Remember, if you're at high resist all, deflects are cute and fun, but not necessary. The reason I run this build is because Radiate is free damage. It's based off of AP, so it's low, but it's free damage, which is free threat. This gives you about 380 damage every 6 seconds, Which is slightly over 165 TPS. It's all about the min maxing on TPS. I grab Kinetic Fury because it gives you 9% more damage for being above 750 Kinetic Energy. This is AWESOME. Everything gives you more threat. Thats now like... a 180 TPS Radiate!
I run 3 interrupts, as seen with 16 ability points in kick. My reason for that is in dungeons, interrupts are a little more sacred. It is required a lot to have many interrupts. I also like being able to interrupt ALMOST EVERYTHING by myself, at least once. It seems to make dungeons WAY smoother when you have good interrupts, as opposed to having a more damaging PF or AS or even Rampage.
Everything else about this build should be fairly standard. Open up with PF, Hit 3 MS, Rampage, MS again. Atomic Spear is off the Global Cooldown. You can use it while midswing on a MS to gain free damage. Defensive grid is used whenever you feel like. Use your judgement.
RAID SPEC (more accurately build because it's the same amps!)
The main difference in the two specs is my Ability points, and my lack of Grapple. In raids, interrupts from the tanks are WAY less important, because you have access to so much more dps, and you most times only have 1-2 tanks, the dps are responsible for the interrupts. I keep kick on me when I can so I still have 1 interrupt to throw into the pot. These ability points are spread out to cause my PF to have more damage, as it gets more use than Atomic Spear, so it's a greater TPS and DPS gain than flipping the two. I add 2 points into rampage. Rampage t6 is currently bugged right now and gives you the same damage as t5. So you have to go to t7 to get a damage increase. What should be a 160 damage per use increase (which is a 480 Threat per use increase btw) is instead an 80 damage increase(240 TPU). The use of the PB is twofold. Sometimes you'll need the extra taunt, because it has longer range, and can make sure you only hit 1 guy. The other use of it is it's lovely 25% damage reduction to everyone in the raid except you for 5 seconds.
The only thing to note in this build is, you'll swap our Kick for Bum Rush and swap out Defensive grid for Leap in SOME cases. These are more specific counter and I'm not really going to cover them here.
These two builds will take care of almost every situation you come across in dungeons and raids respectively. You will need to swap abilities sometimes. The rotation for your threat stays the same regardless of what you are doing. PF, MS 3X, Rampage, MS. Use PF when it comes off cooldown as it is your biggest TPU ability. Use rampage while above 800 KE before MS. Use MS when the other things aren't true. Weave Atomic Spear into a MS swing for free damage and threat.
*IMPORTANT TO NOTE FOR RAID SPEC*
Jolt t4 is considered mandatory for Warrior Tanks. I am looking into weaving it into the build. I'm not sure what ability points will get sacrificed, and I'm not sure what ability (probably kick) will get sacrificed.