Also I see that inKyomih's post that he/she used /target <1> ; /t "Stone Skine" <1>. This is unneeded. You can simply do /ac "Stone Skin" <1> and keep your target on the boss/tank if you want to (I always target boss or adds that need to die. I never target players).
For pets use a variation of this macro. You will need to mark the pet with a square, circle or cross before entering battle. If you are using triangle above I don't recommend using triangle for a pet as you will remove it when you cast the area heal or shield buffs.
/ac Cure <square> (<circle>, <cross>)
/ac Physick <square> (<circle>, <cross>)
/ac Adloquium <square> (<circle>, <cross>)
To target pets make sure you enable pets when your weapon is put away. Put away your weapon and press the target button when next to them. From here you should be able to mark them appropriately.
Hope this helps some of you with quicker reactions when healing.