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 1 to be safe — 1 if everyone is prepared

At level 40, a party of Amaura's top six counters needs 0.23 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.31 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 0:40. A prepared solo becomes possible at level 20. A duo works from level 20.

Amaura · Tier 3

rockice

Weak to

fightingsteelgroundrockwatergrass

Boss CP: 9,287
Boss HP: 3,600
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Amaura 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	1(0.29)	1(0.30)	1(0.42)	0:52	0.8
Level 25	1(0.24)	1(0.26)	1(0.38)	0:45	0.3
Level 30	1(0.20)	1(0.24)	1(0.34)	0:41	0.2
Level 35	1(0.20)	1(0.23)	1(0.32)	0:40	0.2
Level 40	1(0.21)	1(0.23)	1(0.31)	0:40	0.1
Level 45	1(0.21)	1(0.22)	1(0.30)	0:38	0.1
Level 50	1(0.21)	1(0.21)	1(0.29)	0:37	0.0

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.

1 trainer at level 40

Necrozma (Dusk Mane)0.21

A prepared party

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

1 trainer at level 40

Necrozma (Dusk Mane)0.21
Zamazenta (Crowned Shield)0.21
Zacian (Crowned Sword)0.21
Keldeo0.22
Lucario0.25
Terrakion0.26

A mixed local group

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

1 trainer at level 40

Pheromosa0.30
Tinkaton0.30
Kyurem (White)0.30
Dialga0.30
Breloom0.31
Gallade0.31

The party these numbers assume

1. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

2. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

3. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

4. Keldeo

Low Kick + Secret Sword

5. Lucario

Force Palm + Aura Sphere

6. Terrakion

Double Kick + Sacred Sword

See the full ranked counter list for Amaura · 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.