Enemy (Fallen): Arach-No! - When defeated, Fallen Vandals spawn a web mine at their feet.
Destination: Memory of a Frozen Conundrum - Incoming Arc and aerial damage increased.
Burn: Isolated Flames - +50% Solar damage dealt and received.
Champions (Fallen): Barrier & Overload - This mode contains both Barrier and Overload champions which cannot be stopped without an Anti-Barrier or Overload mod, respectively.
Limited Revives - Limited fireteam revives. Gain additional revives by defeating Champions.
Legend Modifiers - Recommended Power 1310
Locked Loadout - No changes to weapons, armor, mods, or subclasses while in the activity.
Match Game - Enemy shields are more difficult to break without its respective elemental damage type.
Extra Shields - Elemental shields added to specific enemies (Solar for Heavy Shanks, Void for Servitors)
Total of 4 Champions.
Additional Master Modifiers - Recommended Power 1340
Extra Champions - Increases total Champions up to 7.
Master: Chaff - Radar is disabled.
Concealed Void is a little tricky with how crowded the Lost Sector's layout can be. While typically survivability would be the priority, the enemy spawns put emphasis on quick and continuous add clear.
Way of the Trapper Nightstalker is capable of giving you breathing room with smokes and invisibility and Shadowshot's Void Anchors are capable of tethering and clearing out a large number of enemies at a time.
Typically Voidwalker will be the go to here but the use of Attunement of Hunter for Devour and survivability or Attunement of Chaos for charged grenades is up the speed and difficulty of the run being attempted. Alternatively, Stormcaller provides plenty of clearing potential and Attunement of Control's Chaos Reach provides a relatively safe way to burst down enemies from afar.
With close proximity being an issue, Code of the Protector Sentinel's Defensive Strike is good for keeping yourself topped off with an overshield, but if you're looking for add clear, Code of the Commander can keep enemies chaining with Controlled Demolition. Another thing to try is Code of the Siegebreaker Sunbreaker since it has intrinsic healing and can control areas well with Sunspots especially in this crowded Lost Sector.
Hand Cannons: These guns paired with Explosive Payload are fastest at stunning Overload Champions.
Auto Rifles: The best option for Anti-Barrier Rounds in this Lost Sector. If you are hoping to play from further back against enemies the new seasonal auto rifle, Chroma Rush, is a solid choice.
Grenade Launchers: Both Special and Heavy Grenade Launchers can use Breach and Clear which is a substantial buff to damage that can help destroy Champions quickly. Salvager's Salvo is good as Chain Reaction can clear enemies with little effort.
Eriana's Vow: With the Solar burn in place, this exotic gun is invaluable since it can deal additional damage, break through Barrier Champions, and will be useful for Solar shields some enemies will be sporting.
Anarchy: This exotic Grenade Launcher is the least likely to blow you up in a close quarters environment and can help burn down the Champions as well as the boss without needing to put yourself in too much danger.
Divinity: Although normally paired with other exotic guns being run by fellow Guardians, the intrinsic Overload disruption on this Trace Rifle can potentially be the best way to clear out enemies.
Overload Hand Cannon: This mod is mandatory for getting past any Overload Champions.
Anti-Barrier Auto Rifle: This mod is the most efficient way to get through Barrier Champions.
Major Spec: Champions count as Majors for damage calculation and this mod will help defeat them more quickly.
Arc Resist & Sniper Damage Resistance: With incoming Arc damage being increased, it's important to have at least some form of resistance against Fallen enemies' plethora of Arc weaponry. Arc Resistance will also prevent you from taking too much damage from the Vex radiolaria throughout the Lost Sector.
Surge Detonators: Good for Overload Champions if you are running an Arc subclass.
Breach and Clear: This mod can increase damage against Champions as well as the boss and will also reload your stowed weapons upon damaging those enemy types with a Grenade Launcher.