A couple things about your choices Axulia:
Axulia Wrote:Can't take points out of Imp Heroic Strike without putting them in either Imp Rend, Imp Charge, or Tactical mastery. Otherwise I'm two points short of impale and deep wounds. Honestly considering putting them into tactical mastery or improved charge, though, with Glyph of Revenge on hand proccing free heroic strikes.
Basically deep wounds is for thunderclap and shockwave, not really for single target damage. It helps to hold aggro on multiple targets. If this is the route you want to go and you need those other 10 points in arms, then I do recommend improved charge and improved heroic strike.
Iron will: This is for pvp, not really for tanking. Stuns are rare now, and charm never seems to happen to tanks.
Imp Rend: You will always have something else you need to use every global cooldown cycle.
Tactical mastery: You won't be stance dancing ever.
Improved charge: This is where you want your points. A tank's most risky point is with initial aggro and starting rage generation. Always charge if it's possible (it usually is in heroics) and use bloodrage as well.
Improved heroic strike: Given your other options for 3 points, this is the one to take because you will be spamming it while single-target tanking.
Quote:Improved disciplines, I don't mind taking points out of, but having your big 'oshit' buttons on hand more often can't be bad.
This one will be a personal choice. I live without it pretty well, although it would be useful for certain bosses.
Quote: I'm wary of taking points out of shield spec, though, which is what I see half-maxed most often, because I don't know about other tanks, but I've had running out of rage cause more than a couple wipes. I'm actually speccing out of anger management and other rage-generating abilities, too.
Okay, bottom line here is that if you are having rage generation problems, it means things aren't hitting you and you should look toward threat generation. The extra from shield block isn't going to do much in the grand scheme of things. Also, of all the types of mitigation, shield block doesn't scale well at all with boss damage. Most warriors simply ignore it now, and blizzard has said they aren't happy with how the system works for it. There will be changes in the next expansion.
Now, looking toward threat generation, armored to the teeth and cruelty are the way to go. The attack power increase from armored to the teeth is actually very big and no warrior should be without it regardless of spec. Leftover points should go to cruelty if you haven't put them in improved disciplines, as more crits are always useful for pretty much any tanking ability you may use.
Beyond those tweaks I think your spec looks good.