Hey dude, nice post although a few corrections are needed:
the illumination nerf was 60%
10k healing is impossible lol. Ideally you want 1200+ for heroics and 1400+ for Kara. In answer to your question Gala, the healing bonus adds to the amount your healing spells actually heal.
Always make sure you have divine favour fired up when possible, it can often prove to be a life saver. It is often better to fire up divine illumination at 40% rather than 20% as this will allow you room to manouvre mana wise. Usually when you get to 20% that is when you should be throwing up mana potions. Obviously when you are this low you should only be using Flash of Light, as Holy Light is too much of a dent on your mana reserve.
one thing that all paladins forget is: PALADINS HAVE A MELEE HEALING AOE!!
Shock Horror I know, but judging Seal of Light on the main tank's target can be a real life saver as it heals on chance of hit (high chance) and gives you a huge break. Also if your tank is having a hard time, throw up a hammer of justice, it gives you a good 6 seconds to get your tank back up to speed.
Also theres 4 essential components to a healers tool kit:
Golden Fish Sticks
Super Mana Potion
Elixir of Healing Power
Brilliant Mana Oil
These combined with the standard buffs will make you uber healing greatness. Its expensive to keep buying these, so keep them for runs you struggle on or guild runs. But with these items and intellect buffs my healing is usually well over 1400 with a 177mp5 - now that is uberness....
Since the nerf, crit chance should no longer be considered when healer speccing. Mp5 and +healing should be your main focus.
For pre-kara level you should aim for +1400 healing, 100mp5, and 9k mana. This can be done without touching heroics, and please please dont be put off to using cloth items. Armour shouldnt be an issue when you are at the back healing, so just go for pure stats.
Ok I think I'm done....
oh and another thing, I noticed you listed a load of paladin macros in a previous thread. I found that using heal-bot over comes all of the time and stress making macros causes. Also there is nothing faster for healing...
And yes I know people have said that healbot isnt real healing and is cheating, but if I had a choice between keeping my group alive through easier means or letting them die through traditional healing i know which one i would choose.