Here is your quickest way to level any character after you first to 60. You do trial roulette, leveling roulette, and guildhest roulette each day on every level without a dungeon (50, 52, 54, 56, 58). Once you hit a dungeon run it three or four times in a row to get your next level (run dungeon at the dungeon level since you get chain XP). Quick and easy, stress free. If you want to speed it up more, add in challenge log XP on the even levels.