This is for the game Fiesta online,
Once you get to a high enough level (20 I believe) you can enter the Tower of Iyzel.
It is a moderately difficult instance dungeon with stronger versions of normal enemies.
These enemies have valuable drops that you can sell for a good amount of money but you can also do the quests, which give INSANE amounts of Exp and Money per Quest.
You can access the the tower until about level 60, then you can go to the other instance dungeon in Uruga, which is rather hard.
If you are not level 20, do Kingdom quests, which reward you with RARES and tons of EXP.
Now, tactics and preferred party are shown here,
A party should consist of: 2 or more fighters, 1 Or more archers 1 Mage and atleast 1 cleric
Strategys:
Kiting Strategy: Get 1 archer to kite enemies while the rest of the party deals damage. Works well with bosses and single enemies.
Tank Strategy: Have fighters tank enemies while clerics heal them and Archers and mages deal damage.
Happy Moneymaking and leveling!