Soulkiller on Insane: The Bar, Soul Vessels and the Nightmare Clock

1. How the Power Struggle bar actually works

The bar runs from −500 to +500 and starts at 0; plus is your side. The rules are the same on every difficulty and did not change with the mid-event balance patches.

• The bar only matters at one moment: when Nightmare spawns. At that instant it freezes, and every milestone it is holding (±150 / ±300 / ±450) switches on for the rest of the battle. Dip back under a milestone before he spawns and you lose it.
• Nothing happens before he spawns. We checked 14,742 main-gun shells fired before Nightmare appeared, and damage was identical with the bar at 0 or at +450.
• The milestone effects stack (they multiply together):

• Main guns only for the team buff. Torpedoes, secondaries and fire get only Nightmare’s +5% per milestone.
• Heals: on Hard and Insane, Nightmare repairs 63,000 HP (14%) over about 27 s, first at roughly 77–84% HP, then every ~108 s.

2. Soul Vessels don’t decide the game for a team that can win

Losing Soul Vessel 1 to a capture feels like the run is over. For a team that can kill Nightmare, it isn’t.

• 4 of the 18 Insane wins had a Soul Vessel captured, and 5 of the 18 reached Nightmare without a single milestone. One win reached him with the bar at −6 after a capture and still sank him with 12 s to spare.
• A capture is worth about 10 seconds. It costs 120 bar points, which is at most one milestone. One milestone is +7% main-gun damage against Nightmare, and Insane wins killed him in a median 2:23, so that is roughly 10 seconds of boss fight.
• The captured Soul Vessel doesn’t leave. It starts shooting, and you still have to sink it before the next wave comes.
• Yes, wins with more milestones killed Nightmare faster (median 4:06 with none, 2:11 with two). But two milestones only add about 15% damage, which can’t nearly halve a kill. The gap is mostly the same thing that filled the bar: teams that clear waves fast also burst bosses fast.

If your team is strong enough, play on after a capture rather than resetting.

3. How long Nightmare takes, and the clock to work back from

Time to kill Nightmare in the 18 Insane wins, from spawn to sink: fastest 1:21, median 2:23, slowest quarter 3:53 or more, longest 4:54.

So the time he spawns sets your odds. Of the 18 winning teams, this many would still have finished inside 15:00 if he had spawned at:

No recorded team won after Nightmare spawned later than 12:08.

Benchmarks for each wave

Waves arrive when you clear them (the Soul Vessel gone and at most one escort left), so your pace sets the clock. Median wave starts in the 18 wins:

• You can leave the last escort of each wave alive. The next wave comes anyway.
• Time alone isn’t enough. Of the 23 losses that reached Nightmare, 15 ran out the 15:00 clock with him still afloat, and 6 of those had him up before 10:00. One left him at 2% HP. Burst him early, before the second heal: focus fire beats spreading damage. What else separates those teams from the winners is in the next section.

The balance patches show in your pace, not the boss

Players got damage and armour buffs one and two weeks into the event. They show up in how fast teams clear the waves, but the Nightmare fight itself took about as long throughout.

Small samples per period: read the direction, not the exact seconds. Your margin comes from clearing the waves faster.

4. Winning the Nightmare fight

Nightmare never arrives alone. Every time he spawns he brings the same four escorts: two Hipper, a Tashkent and a Zieten. That makes the last few minutes a question of where your damage goes, and of who is still afloat to deal it.

• Put the damage into him. The faster half of the winning teams killed Nightmare in a median 1:59 and had sunk only about two of the escorts by then. The slower half took a median 3:53 and had sunk all four.
• Don’t let the escorts shoot you for free. Winning teams lost a median of one ship during the Nightmare fight; losing teams that reached him lost three. Sink the escort that is hurting you: a destroyer lost to the Tashkent deals no more destroyer damage.

Fires and his secondaries

Nightmare carries 18 secondary mounts. Knocking them out and keeping him on fire both go along with winning, but neither is what makes the kill fast:

• Winning teams knocked out a median of 8 of the 18 mounts; losing teams knocked out 2, even though their Nightmare fights lasted about as long (around four minutes).
• He burned for 46% of the fight in wins and 33% in losses.
• But among the wins, the fastest kills had less fire (40% of the fight against 51% for the slower half), and both halves silenced the same 8 mounts.

Burst damage is what kills him. Fires and a quieter secondary battery make the fight survivable, and staying afloat is what separates the wins from the losses. Better teams also simply land more HE, so treat this as a pattern, not proof that fires win games.

Every ship has a job, the cruiser included

Insane teams sail the same three event ships, almost always as two Night Shard destroyers, two Iron Gale battleships and one Ether Tempest cruiser. The cruiser has a reputation as a damage piñata, and it does die the most, but when it survives it pulls its weight:

Per ship, so the two destroyers and two battleships are each counted once. Damage is attributed from the replay: a close estimate, not the game’s own figure.

The cruiser is the team’s first loss in 37% of battles, about twice its share as one ship in five. It isn’t a decoy by design, it is just the easiest thing on the map to delete. Keep it alive and it does about as much damage to Nightmare as a battleship.

Watch the winning games on Debrief

Free, no login:

• Fastest clear: Nightmare at 7:13 with three milestones, sunk at 8:44.
• Typical recent win: Nightmare at 8:49, killed in 2:11.
• Captured Soul Vessel, bar at −6, still won: sunk at 14:48.
• Captured in wave 2, no milestone: sunk at the buzzer.
• Latest spawn that still won: Nightmare at 12:08, sunk with 42 s left.

How these numbers were made

111 unique Insane battles uploaded to Debrief between Oct 6 and Oct 21. A battle recorded by two players counts once. A replay stops when its recorder leaves, so only battles that show Nightmare sunk or the 15:00 limit count as results. Samples are small (18 wins), so read the medians as a guide, not a law.

These replays were uploaded before Debrief started reading loadouts, so they can’t yet say which battle boosters or commanders work best in Soulkiller. Replays uploaded from now on carry every player’s loadout, and that question is next.