You can get a quest called Protect the Honey when you are at level(wk gold) 74 which is is awsome, you can get a friend, pick a side to protect, and kill off the massive mobs that raid you for a full 10 minuets. This gives extremely high EXP. You can do this until your level 90.
You will have the option to grind at Skull Flies at around Level 80~90. They are located in Nagpha Swamp, Bermos AirCraft I. There are a lot of them in here, find two platforms that have the most mobs, mob them into one spot, and simply attack them all. You can get them all around you, then using Pyro-Edge, Mega Flare, Explosive Dagger, Dash, and Energy Blast to pretty much kill them all in a single go.
Once you have done killing one plat, the other plat is back with the full set of mobs. Repeat until Level(WonderKing powerleveling) 100. Then you should grind at spider forest at Level 100. To get there, pretty much go from Hellen and walk all the way to the right until you reach a dead end (no more portals to go through). That dead end is the Spider Forest. Grind here until around level 115. Just have fun in WonderKing.
