I have a full T5 paladin healer, i decided to make a priest.. But my friend gave me his account with his lvl 69 priest. Healing and understanding it isn't an issue and never will be. but as far as new healing abilities.. how should i make my toolbar?

when i had my paladin.. I used flash heal full rank, then several ranks of big heal (i found that i was able to read how much the person needs, so i was almost never big overhealing)

But with the holy priest.. What should i toolbar be.. to maximize the potential to heal to the max.

Thanks