You need edit itemset.csv and monster.csv
Next one is the monster.csv
Open it up and I'll explain, use excel or CSVed.
Here you can change everything about the mobs,
You can change the Attack, Defense, Ressistances or whatever u want.
Let's start with the Important things:
Coloumn25 = Exp; Here you can change the exp of the mob.
Coloumn26 = Money_Min0; Here you can change the min money of the mob.
Coloumn27 = Money_Max0; Here you can change the max money of the mob.
Coloumn28 = Money_Rate; Here you change the dil rate of the mob, I would make it 100000.
Coloumn29 =AIKey; Here you can change the AIKey which i explained at AI folder already.
Coloumn39-42 = AttackDamage_Min/Max_Melee, AbsoloutDamage_Min/Max_Melee; Here you can change the attack of the monsters.
^NOTE;
This applies for the other AttackDamage coloumns, for all of them, I don't have to explain every of them since they do the same thing.
Coloumn31 = MaxItemSet; Here you can change how many Itemsets the mob can drop.
Coloumn158 = Itemset from itemset.csv
The following coloumns are for the droprate, i.e next itemset index and so on.
The itemset.csv its easy to edit.
Red text is that you have to edit, The MaxItemSet can't be more than 15.
Credits to [DEV]Harmony.