this is what i use on my setups

follow macro:

/target inserttoonnamehere
/follow
/focus

cast macros:

/cast [target=focustarget]insertspellhere

/cast [target=focustarget,help,nomod][target=focus,nomod] inserthealingspellhere

/castsequence [modifier:alt] drain life; reset=combat/target unstable affliction, siphon life, corruption, curse of agony, drain life, drain life, drain life