I have not tried the Magus, as I only play Pathfinder in PFS but it seems to be everything the Arcane Archer should have been. It packs a lot of hitting power, and has some degree of defense as well. I know little about the druid archetype, but it seems to me that you would be better off playing a Hunter if you want a druid-ish archer. The free teamwork feats for you and your companion are great, you have access to utility spells, and precise shot for free is always useful. My first Pathfinder character was a hunter, and I love it. You can also look at various Druid guides to find a good companion, though I chose a Tyrannosaurus just for flavor and fun.
