For one, you need to set it up where if you hit this button on the warrior it well trigger this button on your druid. Here is how I would set it up, button wise.
WARRIOR/DRUID
Charge ---> Moonfire
Switch Stance ---> Rejuv
Heroic Strike ---> Regrowth
Execute ---> Healing touch
Thunderclap ---> swiftmend

That well make low down time for eating/drinking. Execute ---> healing touch works good, you can always hit execute even when they aren't below 20% health for the heal against elites or rare spawns .

You basicly have to set it up where when you charge the resto druid well moonfire, and when you use a certain spell on your warrior, your druid well respond how you want it to, hard to explain with out being there talking to you,


Smahs