I would say I do not have the proficiency required to confidently speak toward other classes in conjunction with multi-classing with the Shepherd Druid as I never multi-class, so I suggest you look at this guide http://www.giantitp.com/forums/showt...0#post22693950 which has a substantial multi-classing section.
I will, however, give a shout out to Life Cleric 1/Shepherd Druid X as it creates one of the greatest healers in the game with unicorn totem. I would also advise avoiding multi-classing with melee classes as you want to avoid situations that can cause you to lose concentration at all costs.