Also you mentioned about macro's, Since u asked ill post the ones i use and explain what they do.
This is a Mouseover macro for Hand of Protection, useful for fights such as Saurfang for the blood boil.
#showtooltip hand of protection
/cast [target=Mouseover] hand of protection
This is a Mouseover Macro for Hand of Sacrifice, useful when your not taking damage to mitigate some damage towards you.
#showtooltip hand of sacrifice
/cast [target=mousover] hand of sacrifice
This casts Divine Protection and uses both my trinkets (if they are usable)
#showtooltip divine protection
/cast divine protection
Mouseover Macro for Hand of Salvation.
#showtooltip hand of salvation
/cast [target=Mouseover] hand of salvation
Since Divine Sacrifice became party wide instead of raid wise it lost its value greatly. However Divine Guardian (the 20% reduced damage buff) you get from casting it is still Raid wide. I use this macro for the 20% reduced damage which can act as a extremely useful cooldown for yourself when divine protection is on cooldown, or for your raid during times of increased raid wide damage (i.e. pungent blight during festergut or bloodbolt whirl during BQL). If the macro is hit twice the Damage isnt transferred to you so you dont take any extra damage from it.
#show Divine Sacrifice
/cancelaura Divine Sacrifice
/cast [target=player]Divine Sacrifice