Beacon of Light Question.
You don't necessarily have to swap lots. The Beacon glyph is good for single target burst healing. If you swap your beacon and use DL/FoL to combat high incoming damage on one person, you'll be able to get holy power from Tower of Radiance, allowing you to cast more hard-hitting Eternal Flames.
To make max use of beacon you could quickly swap it to some one you want to DL or FoL to get holy power for it, which is something I personally never do unless the fight has some sort of transition mechanic and the tanks aren't tanking anything.
It's not the strongest effect there is, but the Beacon glyph...
(a) Shows up often. Even if just swapping between MT and OT, there are few fights where you won't do this a half dozen times. Compared to, say, Flash of Light, where you may see it once per fight (and FoL is something that you want to avoid casting, if possible).
(b) Smoother transition. Again, even if just swapping between MT and OT, you get to save a global so you can begin casting upon them right away. Sometime tank swaps happen unexpectedly, or you blinked and missed it. That extra second definitely makes a difference in tank survival... moreso than any other paladin glyph, I would say.
(c) Opens up a new strategy. Being able to swap Beacon instantly means that you can rely more upon Divine Light spamming by healing not just the tanks, but also raiders while still being mana efficient via holy power gains. Divine Light + HP, taking Eternal Flame and Divine Purpose talents into account, is almost but not quite as mana efficient as Holy Light spamming... however, it definitely has greater throughput. Even if you still prefer to have Holy Light as your goto spell for raid healing (when Holy Shock is on cooldown and you're out of/banking HP), you at least have the option to dish out a greater serving of the big green numbers.
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