Alright I'm going to post a few that I know work now and that I use somewhat regularly. All of this may change sometime after Patch 1.3 as Addons are coming.
#show healing ability X
supressmacrofailures
stopcasting
cast @focus healing ability X
cast [alt] @self healing ability X
cast [ctrl] @mouseover healing ability X
The above Macro I have for all of my healing abilities and on my main bar in the 1,2,3...-,= spots. This allows me to maintain attention on one target while healing whomever I choose. The reason you see @self is that if you don't turn off self cast in the settings section the @mouseover fails or just repeatedly casts it on you.
#show Restorative Flame
supressmacrofailures
cast Touch of Light
cast Flash Over
cast Restorative Flame
-OR- (if you're Warden)
#show Deluge
supressmacrofailures
cast Touch the Light
cast Tidal Surge
cast @focus Deluge
This one is your "oh sh*t" button (can be used on-the-run) and depending on your spell power is a huge heal + shield every 45 seconds. You shouldn't need it all that often but it's great to use right after you come out of stun/silence and the tank is going down.
#show Healing Current
supressmacrofailures
cast Touch the Light
cast Ripple
cast @focus Healing Current -OR- cast @self Healing Current
With this macro you get an on-the-run party HoT that's slightly stronger than Healing Flood and has a longer duration.
#show Healing Communion
supressmacrofailures
cast Tough the Light
cast Flash Over
cast @focus Healing Communion -OR- cast @self Healing Communion
Another on-the-run heal but this time it's 10ppl. One issue with this one is it's incredible mana requirement. Healing Communion is one of the most inefficient "casted" heals we have.
#show Healing Breath
cast @focus Healing Breath
#show Healing Spray
cast @focus Healing Spray
#show Searing Transfusion
cast @focus Searing Transfusion
You get the idea here, any instant cast spell that you would use with any regularity you can macro to always cast on your focus (tank) so no matter what they will always get that heal even if targeting/raid frames gets jacked up. These would be on a separate bar.
I will list more as I test them and make sure they work in all situations.
Edited, Jun 4th 2011 3:57pm by delindsay90210