To make this guide work you should be at the event where you have to get the 4 keys to go to patchy.
Well let's start!
I'm at the map where you will meet/buy/sell items from vivit, you see two maids that has a square which
has exp and $$$.
In other words beat the hell out of them and you will get 880exp and 710 golds
Like when you go out from the room, just press arrow down(go down) and you will meet 2 red maids
Just use cirno's summon skill and meiling's epic AOE kick skill if something misses use reimu's dimentional kick thing-y lmao. because those red maids are weak to melee attacks
Same goes for the second maid which has 4 blue maids
cirno's summon skill and meiling's epic AOE skill
Then after beating those Shiz, go inside again and go outside again and repeat the steps
In just a few hour or less than an hour (I don't really know but not so long)
I got epic levels lmao, from lvl 9 to 15 (--,)
The advantage of this guide is not wasting some sp pots killing 1-3 maids which gives crappy exps.
and you just have to go out and inside the room to respawn those 2 maids again.
AND.. you can buy items from vivit which just few steps ahead..
Plus, you can get epic B's and Tent's!