My strategy of leveling up basically means doing the same quest over and over. It's the highest level that I can consistently win, so over and over I build up my XP. only 24 at a time. Grind, grind, grind.
So 24 xp at a time, slowly climb up the ranks. Fifteen more battles before I get to level 9... then the very loooooong climb up to level 10. Can I do it? Will I grind? You bet!!!!
Feels good, man!