You could also try: /cast [@target,help,mod:alt] Flash Heal; [@targettarget,harm][@focustarget,harm] Smite; Smite
This macro lets you cast smite on your target, if you have a focus and no target, or just on enemy, also note if you press alt it has Flash Heal on the same key, (will also change your tool bar icon when alt is down) You can do the same for Holy Fire and Greater Heal.