Apparently, you need to invest heavily into Adaptability for it to do anything. So the 3 to 20 comparison video may be useless. I've found multiple sources that the scaling for Adaptability does not match other stats; that you get more as you invest more. I don't see a reason to not believe it considering the game tells you what you're getting. The magic number seems to be 38. Either way, raising the PvP SL is going to allow guys to completely bypass Adaptability if they so choose and they'll be incredibly strong because their characters can use whatever they want. I think it's best if the community just ignores this stat. Having an extra 30+ levels to play with that potentially don't have to go into Adaptability is going to be dangerous. 130 seems perfectly reasonable to me with the addition of Vitality and the relationship Dark and Pyro has with the Faith/Intelligence stats.