The Codex Druid is close to what, if I'm remembering right, was called an Animist in Rolemaster. Another way to do it would be to have them start with Influence Animals (Lesser), and make the higher versions of the talent a level-based bonus. Not really sure what to do about the spell list, it's both similar to and different from how clerics choose their spells. I would remove the following spells from their selectable spells, as to me they don't really fit the druid theme: Grappling Mist, Sleep Mist, Vacuum, Water Corridor, and Web Bolt.