[@Kibaro] You should take a look at the Druid page [url=http://www.d20pfsrd.com/classes/core-classes/druid]here [/url], the list of animal companions [url=http://www.d20pfsrd.com/classes/core-classes/druid/animal-companions#TOC-Animal-Choices]here[/url] and how they work [url=http://www.d20pfsrd.com/classes/core-classes/druid/animal-companions]here[/url].

I'd recommend taking the animal companion over the domain personally, since we have a rogue in the party and more bodies means easier flanking and thus more sneak attacks. But it's entirely up to you if you want to go more spell-slingy or more tactician. Basically your animal companion does the melee work for you.