My EHP calcs have always shown heart of iron/brewfest trinkets/scarab(jug's vit) well over the EHP value of Glyph of indom. Glyph of indom also won't help on Lord, FC, or Twin Valks. If you're MTing on Anub'Arak then it is an absolute must. If you're OTing you'll probably want to use gnomeragan autoblocker 600 and laventhor's talisman. Since I OT Anub, I've never picked up the Glyph, but it also depends on your gear/armor values, healer preference, and if you prefer absorbing an amount of damage over having more raw HPS. I personally figure as long as I can take the hit I can usually be healed, so I choose whichever gives more EHP, be it armor or stam. The proc on scarab is also damn nice. Run the EHP calcs for yourself though and see what it turns out to be.
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