DiximaN

GMS has had the following crossovers:

• Full Metal Alchemist: A long time ago, there was a set of equips in-game modeled after Edward and Alphonse
• Naruto: As above, there was a set of equips modeled after Team 7 (or at least Naruto and Sakura)
• Bleach(?): There is a set of equips in the game files from a long time ago modeled after Renji and Rukia. I can't actually recall if this made it to GMS, however.
• Mabinogi: A small event where you could obtain a Nao chair. Mabinogi likewise has Maplestory events
• Sword Art Online: The first official crossover event, featuring the SAO dungeon and equips modeled after Kirito, Asuna, Heathcliff, etc.
• Attack on Titan: Several minigames and the battle against the Colossal Titan, as well as outfits/chairs.
• Re:Zero: A set of daily quests, outfits modeled after characters, and medals
• Card Captor Sakura: Daily quests, chairs, outfits, and medals
• Evangelion: Dailies, chairs, outfits, minigames

JMS has had the following events:

• SAO, AOT, Re:Zero, CCS, Evangelion as mentioned above
• Vocaloid: A set of rhythm minigames, chairs, and outfits modeled after the various Vocaloids
• Pop Team Epic: Outfits and chairs modeled after Pipimi and Popuko
• Magi: Outfits and chairs
• K-On: A small one that GMS explicitly had to remove due to a lack of licensing rights, included hairstyles from the Light Music Club.

EMS (since removed) has had the following event:

• Psy: EMS had a Psy event, for some reason.

Otherwise I'm unsure which crossovers EMS received before they merged with GMS, if they had any.

KMS has had the following events:

• Frozen: A set of equips, mounts, and chairs modeled after Anna, Elsa, and Kristoff.
• Coca-Cola: A long time ago KMS had an area called Coke Town. It has since been removed.
• Lee Mal-nyeon: A famous cartoonist in Korea. He was added to the Legends Return PvP event. Because sure, why not.

KMS has not had any of the above events (SAO, AOT, Re:Zero, Evangelion, etc).

B-party balance

in OLD times s, classes used to be strong and having it would benefit the party hugely.... having an archer=having critical damage- having a dark knight having high hp - having a paladin means having strong defense .

party quests used to give the best exp and very nice items ( Dojo belts broken glasses-minerva gloves-Michael glasses were so hard to get and so wanted! )and pq gears!