Well 75~85 You can do Blue Kents at leafre
And 85~110 Flame Gear build lets you do Peak and you will level almost every hour . Peak yields 100%+/hr at level 8x and early 9x
110 Is when you get your ultimate so you might as well go spam it everywhere such as Newts, Crimsonguards, Blue Wyvern , Ice part of time temple , Skeles , Galloperas