If you're like me, you might have been stunned after the patch to find out just how bad it is to have only single target heals (LoD on a 30 sec cd doesn't count) that vary in efficiency/throughput but not in the style of healing (our raid utility healing: GoHL, SS+hot, JoL, all gone). So I figured I would pass along the current strat I have been playing around with that is starting to show some promise for healing icc at level 80...
-- Emphasize haste/spirit in your gear (reforge away crit), keep beacon on the main tank and JotP up.
-- Your spam spell is just holy light on the beacon in order to generate holy power, toss out FoL/DL on the beacon as needed based on incoming damage. Goal is to try to keep 3 stacks of holy power up as much as possible.
-- Use WoG for useful spot healing tanks/raid, don't just spam it when it's available or to heal a raid member who took minimal incidental damage. Since you're casting heals on the beacon fairly frequently you don't have to worry about the stacks of holy power falling off.
-- Try to keep HS available for spot healing as well rather than using it every time it's up as a primary source of holy power, in which case it's probably on cd when you actually need it.
-- Be liberal with your use of hand of sacrifice; this ability combined with PoTI greatly enhances your ability to heal the tank with more mana efficient spells than FoL/DL. Pre-patch you would probably hand of sacrifice and heal yourself, letting the beacon then heal the tank. Post-patch you use hand of sacrifice and direct heal the tank (or another raid member depending on incoming damage), letting PoTI heal yourself.
Note that a key philosophical difference pre/post patch here is that before the patch the beacon was used to heal the tank, as opposed to here where primary role of the beacon is now to generate holy power by casting direct heals on the tank and the actual healing aspect of the beacon is reduced to incidental-style healing as you spot heal the raid.
Anyway, just my two cents. So far this is the most promising of a variety of strats I've tried in 10/25-icc HMs. Comments/suggestions?