I would really like for a paladin that uses glyph of beacon of light to post some logs of their raids. I find it really hard to imagine situations where beacon is swapped enough to make it a useful glyph.Each swap costs you 6% base mana, or about 3/5ths of a Holy Light cast, so its not difficult to do the math on that. At best you only do this once (refresh, not swap necessarily) and at worst this could be many swaps done each time a tank switch happens (Chimaeron, Halfus, or Magmaw perhaps).
Personal preference, I think. I'm guessing one is better off using another glyph in a majority of encounters.
To beat Glyph of Divinity (which I assume you're hating on me for not having) it would need 9500-11,000 mana spent, or 19,000-22,000 (it is still bugged correct?), which is like... a lot of Beacon swaps. 8-16 swaps to match it, more to beat it, unless you manage to use LoH twice in one fight.
Sorry I think this was all mathed previously in the thread but it may be buried. :D