Try this while using your main Druid to target?

D1's macro
/castsequence Cyclone, Rejuvenation, Rejuvenation
D2's macro
/castsequence Rejuvenation, Cyclone, Rejuvenation
D3's macro
/castsequence Rejuvenation, Rejuvenation, Cyclone

You may have to goof around with target modifiers to get it to work properly. Would also recommend choosing anything low rank that is instant cast to conserve mana for the filler. i.e.
/castsequence [harm] Cyclone, [target=self] Rejuvenation, [target=self] Rejuvenation
OR
/castsequence Cyclone, Insect Swarm(Rank 1), Insect Swarm(Rank 1)