played less lower level
Yeah, I know this suggest look lame, but for most common situation it just work.

heal and protect
there have class could heal (Arme_magic) (Ryan_Druid), since the potion are fairly expensive, so this kind of class always welcome in battle.

gang the monster
fight the same monster with you teammate, two are batter than one, two or more peoples more safety than solo fight with it.

split side when Boss battle
the Boss have massive power but weak AI, so when you and the teammate split two side, the Boss would became confuse, because no matter which side him fight still gonna hurt.

early stage and later stage
before 30 levels you gonna facing that fact there non player base in early stage, after that close to the end map about 70 levels are most player base locate at.

Next: ask the room holder move to next level of the game

+1 : start the game with one more of player, example two peoples then start the game are three player. +2 meaning full build then start the game.

MP: restore magic point(MP), meaning told your teammate to wait for your MP, most of magic magician or dancer this kind of class, they could heal teammate but need three column of MP.

X: told the room leader push x to skip the dialog

Z: skip the reward screen

afk: away from the keyborad, which mean this guy not playing.

go: told the room leader to start the game

ty: thank

rdy:ready

wp:well play

Jump dodge
yeah I know this sound pointless, but this are the basic thing in this game, when you attack remember two or three hit, since most character long hit animation, avoid hit the last hit while in Boss so you could jump and dodge the Boss attack.

Skill dodge
the basic thing in this game, every class skill attack are invincible time, so when you expect Boss or minion gonna hit you can't dodge just use the one tier of skill to enter invincible times.

UP dodge
in this game there are special skill, are arrow UP when you still in combo, this cost nothing from MP, this really helpful when minion and horde level, however Boss won't effect by this attack.

Block dodge
some character like Elesis had the skill block(X) , so when Boss jump attack or direct hit, you could dodge it if you time it right.

the only mission you shall care now when you reaching the end build levels, since most of the early stage mission only give small items to you and non exp give you, so the concern shall be the current stage of your then do the most need mission to you.

Character mission
the early stage of the character had near 4 job to upgrade, the later stage one job character still need to awaken mission to got the final skill.

Infinite mission
when after you reach the 85 levels caps, you would enter a stage which personal call it"infinite stage", in this stage you would earning exp again in early mission and there no end phase that you would never end, the benefit are click the left down side of the icon, in there you could investment your skill point to enhance the static, this include the attack and magic bar which you could put in points as you like.

Collect the full monster cards collection
some early mission now still give you exp even you already in 85 levels caps, so you still have some freedom and a little mission to back which are the monster cards, when you full collect a set of cards you got a small static upgrade.

below list out the detail thing about each heroes, just advice and without force you to do, you favorite are on you decision.

would keeping updated while new patch or upgrade version.

Ronan
A mix close and range magic hero, a more newbie friendly like charter
Job1: the basic close melee hero like Elesis.
Job2: you could use sword art and white magic, in total more than six skills.

Inquisitor
really rapid melee attack speed, huge knock back enemy while keeping forward so you won't miss the attack combo, knock back effect the Boss either.
Job 1: one bar skill and two bar skill own a long time protect animation so you could doge the enemy and Boss skill attack.

Lire
the first range attack base character, not that good for beginner cause the slow fire and lower damage dps compare to other heroes.
job 1: terrible combo thought out the whole game, with slow fire rate and limit range that made this combo worse than other skill tree.
job 2: could shot in large range so you could much easy to hit enemy or Boss.

Elesis
the most common melee character in early game, quick combo in close range.
job 1:short range and normal close range.
job 2: holding a lance, as a lancer you could throw out a range lance damage a lane enemy, most of skill are damage a horizon range enemy.

Arme
own the most scary spell in-game that could heal teammate.
job 1:black magic to attack spell, white magic to heal or shield.