While the overall difficulty is well balanced for a full group of six players, it is possible to try to tackle it with fewer than that, and for an equally greater challenge. Rewards you can gain from the 6-player dungeons include Soul Shields and accessories, a chance at chests that contain weapons, and various crafting materials.
Blackram Supply Chain 4-Player (Hard Difficulty)
The 4-player version of a dungeon is the max-level version, and offers greatly increased difficulty. Not only are enemies doing more damage, but you won’t see any attack telegraphs (you’ll need to memorize their animations), and you won’t receive any ability suggestions or dodge timers. Bosses may also have additional abilities or different attack patterns, as well as increased health and reduced enrage timers (the amount of time before their damage is increased to instantly lethal levels). You also won’t have the standard Dragonblood to use to resurrect, although your other party members can still always resurrect you directly (if they’re still alive). Of course for the greatly increased challenge come increased rewards—including the boss’ own weapon as a drop, and exclusive outfits and accessories.
E. Fleet Supply Chain 24-Player (Easiest Difficulty)
The 24-player version of Blackram Supply Chain is called the E. Fleet Supply Chain, and must be entered directly from the instance portal. 24-player versions of dungeons allow multiple groups of players to enter at the same time to conquer constantly respawning enemies and bosses. You can’t use the Cross Server Dungeon finder to join a 24-player dungeon, and instead will want to look for others using the Party Finder, or for people gathering at the entrance to the instance with Cheap Blade And Soul Gold. It all comes down to efficiency of the groups working together to defeat enemies, so joining an efficient group can be extremely lucrative. When an instance fills up with 24 players, a new instance is created and any new players entering will be placed into that one, and then the next when that one’s full, etc.
Enemies have generally increased health, and reduced damage, allowing anyone who enters the ability to contribute. It’s entirely possible to enter alone and work with the other players already in the instance, but it’s generally recommended to enter with a few other players, or post a notice for a group in the Party Finder. There are daily quests that will regularly send players into the standard 6-player dungeon, but a large number of daily quests exist for the 24-player version, and they can be excellent sources of experience and Blade & Soul Gold.