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 — 3 if everyone is prepared

At level 40, a party of Minior (Blue)'s top six counters needs 2.04 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.75 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:23. No level in this range makes it soloable with a prepared party. A duo works from level 45.

Minior (Blue) · Elite

rockflying

Weak to

rocksteelwaterelectricice

Boss CP: 39,815
Boss HP: 20,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Minior (Blue) 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(2.40)	4(3.23)	5(4.22)	14:53	6.0
Level 25	3(2.14)	3(2.57)	4(3.46)	11:51	5.9
Level 30	2(1.96)	3(2.26)	4(3.04)	10:25	5.8
Level 35	2(1.81)	3(2.15)	3(2.90)	9:53	5.8
Level 40	2(1.79)	3(2.04)	3(2.75)	9:23	5.7
Level 45	2(1.74)	2(1.97)	3(2.67)	9:04	5.7
Level 50	2(1.69)	2(1.90)	3(2.55)	8:45	5.7

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

Zamazenta (Crowned Shield)1.79

A prepared party

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

3 trainers at level 40

Zamazenta (Crowned Shield)1.79
Necrozma (Dusk Mane)1.81
Zacian (Crowned Sword)1.81
Kyurem (White)2.13
Kyurem (Black)2.31
Regieleki2.38

A mixed local group

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

3 trainers at level 40

Inteleon2.70
Lucario2.70
Kyogre2.70
Eternatus2.74
Dialga2.73
Rampardos2.74

The party these numbers assume

1. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

2. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

3. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

4. Kyurem (White)

Steel Wing + Ice Burn

5. Kyurem (Black)

Dragon Tail + Freeze Shock

6. Regieleki

Thunder Shock + Thunder Cage

See the full ranked counter list for Minior (Blue) · 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.