My main attack sequence is:

/assist focus
/follow focus
/castsequence reset=combat/10/target Icy Touch, Plague Strike, etc, etc ,etc

Now I normally use FTL system, but it proved too cumbersome and the macro's too long. This way the slaves assist and hit follow and then attack (making sure they are facing the right way and close enough).
I just spam this key throughout the fight and it works wonders.
For pvp I just made a few attacks seperate and using the FTL system so I could change leaders on the fly as they died.
example:
/target FTL system thingie-longassmacro
/follow
/cast [target=targettarget] Icy Touch