User blog:Neeeeeeenja7/Experience Farming? And 1 other question?

What is a good way to experience farm when your a medium-high level? Everyone says skagzilla but he doesn't give a whole lot. I am level 37 hunter and i just completed playthrough 1. And i am having trouble on the general knoxx DLC and would like to gain some levels to make it easier for me. So any way to get to get experience quickly? And 1 other question. If you gain levels in online play are they carried over to offline play?