Yes, you should cast EF in that situation. Also, if you're using LoD that much (or for whatever reason you feel the need to use it), that's a hint that you probably need to switch to the talent that currently is designed to use LoD as its finisher (which is SH). Crit is a Holy Pally's worst stat. You should be gemming/reforging mastery, not crit. Switch to Holy Avenger. Take off Avenging Wrath glyph and use Hand of Sac glyph. The only reason to be in EF in 25 man is if you're on Malk or your tanks are taking stupid amounts of damage (which obviously isn't happening).