Ialso posted in mine form for multi-classing for dragon.
Example of classes water thats will allow dragon to even breath under water, fire they will even dive into solid lava, wind master of air combat, life a dragon thats can breath life, andearth dragon thats use the very earth as defense and also can dive right into the earth itself.
There woudn't be any tempest or thunder dragons thought just basic element even the Light and Darkness dragon would have to be a speacial event thats shouldn't begin in a very long time from now (dark dragon would master dimensional pocket and able to use it as an attack and can cast tempest bolt).
Those are a few suggestion of classes wich all have there power and like those classes might have a speacial effect.
Also Primal bolt is something dragon are infuse with but it not what lie within but that what lie within all and nature primal power thats exist in many creature thats give them str.
However multi classing for dragon mean they learn of the ability thats divide and make them them and inseat of seing there claw to cast they reach inside and use there mouth to cast bolts.
They will use there primal and claws t str all there ability and only dragon thats finish RoP can truly bring out there power.
It only natural dragon would be able to take elemental classes.
http://community.istaria.com/Web/ShowPost.aspx?PostID=24732
Dryads wings ar fragil yes they can be fast however they shouldn't be able to fly higher then the regualer trees as the wind current would be to much for them if they fly higher.
Flying so high could strik damage to them untill they return to there normal flight lvl.