Is there a guideline/rule that tells how far you can advance an animal as your AC before it "jumps" to the next druid-category?
Thematicly, I like the Megaraptor a lot, but at the higher levels, he's clearly inferior to Dire Tigers or Dire Polar Bears and such. How many HD can you add as regular advancement (not the extra HD of the Druid-AC advancement), before he becomes a higher category AC?
As for Wildshaping, I assume you can simply add Animal HD up to your Druid level?
Thanks in advance!
