i had one of my shamans ele and resto spec kind of hybrid you could say. i would buff his weapon with earthliving weapon

the macro i would use was
/cast [nomod] lightning bolt
/cast [mod:shift,target=focus] lesser healing wave

worked like a charm just needed his heal

the other shamans would continue casting lightning bolt

now for an emergency heal i used
/stopcasting [harm]
/cast tidal focus [harm]
/target [target=focus]
/cast natures swiftness
/cast healing wave

the key i had this bound to also triggered my palidans divine protection.

all my shamans also have this added to lightning bolt
/cast [target=focustargetarget] lesser healing wave

this way if i lost aggro they would all heal whatever my target was targeting.. chain heal spam is good but its 3 secs.. this is more of an "oh Sh**" heal