I hardly interrupt something more often than 20secs. And a 6sec lockout followed by a stun is a nice way to pressure/kill a healer.
I usually use wog during holy avenger enough to keep this buff up. Adding another 9% damage to our burst helps.
Helps if the opposing team has mostly physical damage. I dont use it on 1 physical + 1 caster though.
Some survival. meh.
TV and WoG are pretty mandatory... after that our glyphs are annoyingly situational... Double Jeopardy is not bad for setting up a kill... overall, as usual, we have a few token strong glyphs and a bunch of crap... looking at the options that my Spriest partner has for glyphs makes me pretty angry, pally glyphs have always been incredibly uninspired (remember before MoP when all our minors were "reduces mana cost of some seal or blessing by 50%" copied and pasted 6 times?)