Castsequence DPS/Heal?

wondering if anyone knows a way to use cast sequence to slot a heal inbetween DPSing? i made the /castsequence macro fine, but i cant figure out a way to define a friendly target to heal within the sequence.

basically, i want something along the lines of :

/castsequence [target=focustarget] lightning bolt, lightning bolt, chain lightning, lesser healing wave

is there any way to define where the LHW goes?

its somewhere in these forums.. kinda hard to search it though. but the basic idea is to make two /castsequence macros in the same macro, and add null returns for spells by using commas.

for example:
/castsequence [target=focustarget] lightning bolt, lightning bolt, chain lightning,
/castsequence [target=focus] , , , lesser healing wave

the commas with the blanks returns nothing in the second castsequence as does the space after the comman in the first castsequence.

If you look in to the link in my sig about using /click, you can write a macro that pushed multiple buttons, allowing for fairly complex spell rotations.

thanks guys =)

will try both ways and see which way works out best for me!