I don't use many macros for healing (should see my tank macros /sigh). Here are two I use
Interrupts, yes, trees can interrupt, two clicks here
#showtooltip Skull Bash(Cat Form)
/cast [nostance:3]Cat Form(Shapeshift)
/cast [stance:3]Skull Bash(Cat Form)
Innervate, this also activates the top trinket, only useful, if you have a use +int trinket.
#showtooltip Innervate
/script UIErrorsFrame:Hide();
/use 14
/script UIErrorsFrame:Clear();
/script UIErrorsFrame:Show();
/cast [target=yournamehere] Innervate