Only two maps clear of obstacles I remember vividly are Crusaders (15) and White North (32). But there ought to be some more in between...

Quote Originally Posted by Zandel View Post
Just some info for all you XP farmers out there, the higher the oil cost the more XP per oil you get. I have yet to see a map that does not match this.
If going by the wiki, same goes for currency.

But gains do slow down, so if you can hit White North, the premier "easy" map on North zone, you don't lose that much by parking in there for a next ten+ levels.)