WotLK Glyph tips and stacks?

[carucorpser]

So i just made a warrior on Icecrown and I'm leveling up pretty well. I have been thinking about getting some glyphs. I was wondering if there are some glyphs that are a "Must Have" especially for a protection warrior. I am also wondering if there are any glyphs that go hand in hand with each other that stack really well. For example the Major Glyph of Sunder Armor and Devastate....Do these two stack with each other where i use devastate and it applies 2 stacks of sunder armor and it will apply 1 stack to a near by enemy?

[SilverFlash]

For example the Major Glyph of Sunder Armor and Devastate....Do these two stack with each other where i use devastate and it applies 2 stacks of sunder armor and it will apply 1 stack to a near by enemy?

Yes,they stack.