Dage/Nulgath Idea

Now Dage and Nulgath are enemies, just like how King Alteon and Sepulchure were enemies before Drakath came.
And when I see people with both Dage and Nulgath stuff, I'm always like "Which side you even on??"
You know how if you chose Evil you can only do evil rep and go to evil shop? And same goes for Good shop and good rep? Well I rekon there should be something like that with Dage and Nulgath. Where you choose which side you want to be on and you only get stuff from the side you're on. So if you choose Dage, you're not allowed to do Swindle or Juggernaught Items of Nulgath quests etc...
Opinions?