Here's what I do for macros and ISBoxer Click Bars to heal (cross posted from the ISBoxer site):

I've updated how I do the healing with my cleric. I'm now using a click bar in combination with this set of macros:

Macro: Heal1-3

Code:
#show Healing Breath
cast [ctrl] @mark 1 Healing Breath
cast [alt] @mark 2 Healing Breath
cast [shift] @mark 3 Healing Breath
cast @self Healing Breath
[the last line is more of a debugging flag -- it will cast if none of the mod keys get sent via ISBoxer's click bar (which will never happen, but in case it does, I want to know lol)]

Macro: Heal4-5

Code:
#show Healing Breath
cast [ctrl] @mark 4 Healing Breath
cast [alt] @mark 5 Healing Breath
cast @self Healing Breath
Macro: HoT1-3

Code:
#show Healing Grace
cast [ctrl] @mark 1 Healing Grace
cast [alt] @mark 2 Healing Grace
cast [shift] @mark 3 Healing Grace
cast @self Healing Grace
Macro: HoT4-5

Code:
#show Healing Grace
cast [ctrl] @mark 4 Healing Grace
cast [alt] @mark 5 Healing Grace
cast @self Healing Grace
Here are the keymaps to fire this macro:



Here's the click bar setup:



Here's how it looks in game:



(added an extra button to the toggle bar to turn on the mouse repeater, and placed a repeater region over the pet bar for all toons with pets)