The very first thing on start you really need is Helper. Helper is in top-left corner (Gear Wheel or press Z key).
There you can select and write thing that Helper will automatically collect.
In our opinion, you should start with writing:
Heart of Love - Heart
Silver / Golden medal - medal
Elemental Rune, Mithril
Many possibilities of Box - Box
Event entries - Sign / Paper / Symbol....)
Also Helper makes you kill everything in range.
Good thing for mostly afk players, or people, who play with more characters.
Simply right-click on leader of party and press Assign helper.
Now when it's on, your leader can press CTRL+S to move whole party wherever he can(Except events) and turn on their Helpers.
If you want to be on top of leaderboard you need to watch Exp Per Second, which you see in Helper in bottom-left corner.
Each map has difference in deffense/damage. Stronger mobs have better experience than lower ones.
So you start on maps that require level 0 - Lorencia, Noria, Elveland.
Depens on your party and playstyle, but basic leveling should look like this:
Lost Tower 1-5
Lost Tower 6-7, Atlans 2
Atlans 3, Tarkan 1, Aida 1
Kanturu 1, Icarus
Kanturu 2, Acheron - Alkmaar, Crywolf
Acheron - Ubaid, Debenter
Acheron - Uruk, Nars
You can complete many quests by clicking T key. There you can find quests that gives you Blessings. Blessings boosts your expierence in percentage.
We have Lower, Medium, Greater.
Good thing in quests is also Werewolf killing in the start. It gives you Kaolin, which is very first Muun that provides good damage in start.
Red Pig invasion - Best jewel invasion
Golden invasion - Gives you Boxes +1..+5 where you can recieve Excellent items with 3 options.
Mini-boss invasion - You can get starter items (Chaos weapon, BoK+1, jewels..)
Red Dragon invasion - Basic Excellent Rings, Pendants
Muun invasion - Eggs which gives you Muun pets into Y key inventory. Each muuns provides different options.
Element is the core thing that lets you stand higher maps (Acheron+).
In the start you recieve box with begginer pentagram(which is not strong). You can drop better one in Atlans and Acheron.
If you get Acheron pentagram from mobs or invasion, you should be able to exp there effectively.
With Mithrils you can make Ertels. Pentagram has 1..4 slots and each slot is for 1 type of Ertel.
Anger - damage
Blessing - deffense
Integrity - attack success rate
Divinity - deffesnse success rate
Those Ertels can be upgraded by Elemental Runes. Those Runes are in basic drop and many invasions.
Earrings are upgradable with Three Vacancies. Vacancies are in Invasions or you can disassemble rings and pendants in Goblin Machine.
There are 2 types of them. Left one requires 300 level and right one 700.
When you wear both you recieve set bonus.
Each one of them can provide options.
Ruuds can be dropped in invasions or Events 600 level+
With Ruud you can buy core items after reaching level 600. Those items are weapons, sets, guardian pets, upgraded earrings and ruud spells.
Ruud sets are basically stronger ancient items. They gives you great options which will help you in later gamaplay.
Weapons have great damage, so they are also way to go.
Guardian pets are simillar to fenrir. They give you damage/deffense and elemental damage/deffense. Those options are random.