Quite honestly that Glyph is a joke (and it's Shield of Righteousness, that's a big pet peeve of mine ...). Seriously, Shield doesn't cost much mana to begin with, and I don't know about anyone else here, but I have not had any mana issues unless I'm running a Heroic in which case I vastly outgear the instance. You're better off forgetting this Glyph exists imo.
Majors, pick 3 of: Divine Plea, Hammer of the Righteous, Salvation, Seal of Vengeance.
Minors: Glyph of the Wise, Lay on Hands, Blessing of Kings.
This, or close to it. I use the undead minor glyph still. I wouldn't recommend it, but the minors give so negligible a bonus that I haven't changed.
Sense Undead is awesome for Naxx and most of Northrend, but there's not a single undead mob in Ulduar, and it doesn't work in PvP except against Frost DKs for the 15 seconds of Lichborne. I already miss using Sense Undead. There's no marks on my mini-map anymore.