Group size estimator

How many trainers do I need to invite?

The Estimator is already "trainers of this attacker needed to finish inside the timer", so this page does not invent a number: it reads it off the boss's own ranked counter list for three realistic parties and re-simulates each of them at every level from 20 to 50.

Raid bossTierIVsWeatherFriendshipDodgingShadow attackersMega attackersLegendary attackers

Invite 3 to be safe — 2 if everyone is prepared

At level 40, a party of Duraludon's top six counters needs 1.97 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.46 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:04. No level in this range makes it soloable with a prepared party. A duo works from level 40.

Duraludon · Tier 5

steeldragon

Weak to

fightingground

Boss CP: 43,994
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Duraludon at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time	Faints per timer
Level 20	3(2.47)	3(2.97)	4(3.87)	13:39	6.0
Level 25	3(2.04)	3(2.51)	4(3.12)	11:34	6.0
Level 30	2(1.79)	3(2.15)	3(2.74)	9:55	6.0
Level 35	2(1.72)	3(2.05)	3(2.60)	9:26	6.0
Level 40	2(1.69)	2(1.97)	3(2.46)	9:04	6.0
Level 45	2(1.62)	2(1.87)	3(2.37)	8:37	6.0
Level 50	2(1.54)	2(1.81)	3(2.29)	8:19	6.0

Whole trainers in bold, the raw estimator in brackets — 2.04 means two trainers is right on the line and three is comfortable.

Six of the best counter

Every trainer brings six copies of the single best counter — the theoretical floor.

2 trainers at level 40

Keldeo1.69

A prepared party

Each trainer brings the boss's top six counters, powered up and correctly TM'd.

2 trainers at level 40

Keldeo1.69
Lucario1.88
Terrakion1.92
Blaziken2.03
Landorus (Therian)2.14
Kartana2.17

A mixed local group

Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.

3 trainers at level 40

Excadrill2.32
Marshadow2.41
Garchomp2.39
Hawlucha2.44
Latios2.44
Necrozma (Dawn Wings)2.49

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Lucario

Force Palm + Aura Sphere

3. Terrakion

Double Kick + Sacred Sword

4. Blaziken

Counter + Aura Sphere

5. Landorus (Therian)

Mud Shot + Sandsear Storm

6. Kartana

Fury Cutter + Sacred Sword

See the full ranked counter list for Duraludon · check a real lobby (win chance, who brings what) · make a share card of the top six

How this is worked out

The boss is ranked once at level 40 with rankCached (the same memoised call /raids makes), then the three bands — rank 1, ranks 1-6, ranks 13-24 — are re-simulated at each attacker level with an 8-run Monte Carlo each. Holding the party fixed and moving only its level is deliberate: it answers "what if my party were level 20" rather than "what would a level-20 player's completely different party be", and it is about ten times cheaper than re-ranking every attacker seven times. The Estimator itself is Pokebattler's definition, time to win including rejoin time divided by the raid timer.