Wanna level up your World Tier but you think it's hard because you can't wait until you reach max lvl? Here's an easy way to do it.
How to Lvl Up World Tier
You'll have to repeat one of the story segments.
To easily farm and level up your world tier, just select a story point (on the character select menu).
The story point you want to select is : Free City - Reach the other side of the river.
You'll have to play that in loop, it's pretty easy as all the enemies are just simple monsters so there's not much flying around, they all run at you to die.
There's a chest on your right when you start.
Once you've defeated the boss you can lower the bridge if you want but you don't have to.
You can also farm the two chest that are after the boss and the two mining spots.
Just go back to the main menu and restart that story point and enjoy the easy farm.