I just want to add a small piece of info here.Colossus Smash: Your Colossus Smash refreshes the duration of Sunder Armor stacks on the target.
Whether or not you are the Sunder-Supplier of your raid, this is overall an excellent glyph to have. Factoring in Colossus Smash is consistantly your second priority move on all rotations, an additional useful effect added to your main ability naturally is an excellent addition. Plus, if you are the Sunder-Supplier of your raid, not having to use Sunder Armor each time the stacks need to be refreshed is naturally a Dps increase.
Heroic Throw: Your Heroic Throw now applies a stack of Sunder Armor.
This glyph definatly has enough worth to be mentioned as a viable option for set up. Heroic Throw is a recommended ability to use before engaging the encounter plus as an ability to use when you have to move out of melee range of the boss during certain raid mechanics. Not only does this glyph allow you to immediatly apply a stack of Sunder Armor at the beginning of the encounter, but if by chance you have to remain away from the boss for a long enough duration where your stacks of Sunder Armor would drop off...this is the perfect glyph to use for the use of refreshing such stacks and saving you the GCD's that would have been spent otherwise! Also, this glyph has an obvious benefit if you are by chance the only warrior in the raid or are the warrior designated as the Sunder-Supplier...the more GCD's oriented towards pure Dps the better, right?
If you use both of those glyphs, you will NEVER have to use sunder armor.
Because heroic throw applies the first stack of sunder, and colossus smash will refresh AND increase the stacks of sunder everytime you cast it, after 20 seconds into the fight, you will guarantee 3 stacks (sooner if lucky with procs) for the entire fight..