Ok, as others have said, you first must spend six AA points in the general abilities. The popular ones are Run Speed, Innate Metabolism, and Innate Regeneration. Each one has three levels and each level costs one point. Since you are dead set against RS3, I would recommend IM3 and IR3. Don't waste the points on the stat/resist AA.
Next you have to spend twelve points in archtype. For casters, spell casting mastery is the popular choice. It also has three levels and the cost for each level is as follows: 2, 4, 6. Right there are the twelve AA that you have to spend in the archtype section.
At this point you have spent 18 AA, and the class type of AA are open to you. Personally, I like dire charm for the early PoP levels since there are mobs that you can DC. Sadly, after the early levels of PoP, Sony didn't add the mobs in other zones for druids to DC. So the nine points that you spend for DC could end up being a waste unless you only hang out in the early levels of PoP or farm tradeskill items in the old world.
Before you spend the nine points on dire charm, do some researach on where you can use the ability. Namely, which zones have mobs that you can DC. Also, with other abilities like Mass Group Buff and Exodus, you might be better off spending it on these abilities and receiving better results. It depends on your play style.
Also in terms of leveling vs. getting AA, level 65 really seems to be a "sweet spot" for AA. Based on your spells and where you can hunt, the AA can really flow. I would recommend getting to 65 then taking the time to knock out some AA. Also, if you find grinding out levels to be a pain, you can switch to AA and get a point or two as mini-goals.