Merlin13KAGL wrote: »Quality of item has no effect whatsoever.
CP / level of the item (which in turn limits the level of glyph that can be used) and quality of glyph (Aspect rune) are all that determine the overall effect.
One other semi-relevant thing, you will only get full glyph benefit from head, chest, legs, and shield, jewelry, and weapon pieces.
You'll get about 40% benefit on hands, feet, waist, and shoulders.