i also have had a fire claw druid and i would have to say that bear is the way to go because only as a bear can you reach 4 frames or 6.2 attacks per second. and fire claws is unblockable but it doesnt always hit if that makes any sense. so basically if your AR roll lets you hit then you will hit and if not you wont so AR is very important to this build.

I would also have to agree that casters are really hard but i have had some luck with unshifting and casting fissure.

also i gave my self 1 point into oak sage because it helps increase your life with only one point and even more since you will probably have alot of + skills gear on.