Using these programs it I put togeather a quick list of how to level the fastest with the fewest runs.
As long as all my info is correct give this a shot.
1-8 Level yourself anywhere
8-20 Decisive Battle
20-30 Dethrone the White Tyrant
30-36 Trampled Plains
36-41 White Tyrants Challenge
56-70 Shady Forest
Hope this helps and saves you the 20 minutes it took me checking up on :P