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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Mr. Rime's top six counters needs 2.62 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.61 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 12:05. No level in this range makes it soloable with a prepared party.

Mr. Rime · Elite

icepsychic

Weak to

rockbugghoststeelfiredark

Boss CP: 44,713
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 Mr. Rime 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	4(3.30)	4(3.92)	6(5.36)	18:04	6.0
Level 25	3(2.90)	4(3.34)	5(4.53)	15:21	6.0
Level 30	3(2.55)	3(2.92)	5(4.03)	13:27	5.9
Level 35	3(2.48)	3(2.77)	4(3.80)	12:44	5.9
Level 40	3(2.30)	3(2.62)	4(3.61)	12:05	5.9
Level 45	3(2.26)	3(2.53)	4(3.50)	11:39	5.8
Level 50	3(2.19)	3(2.44)	4(3.37)	11:13	5.6

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.

3 trainers at level 40

Zacian (Crowned Sword)2.30

A prepared party

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

3 trainers at level 40

Zacian (Crowned Sword)2.30
Zamazenta (Crowned Shield)2.33
Necrozma (Dusk Mane)2.41
Necrozma (Dawn Wings)2.61
Blacephalon2.97
Metagross3.13

A mixed local group

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

4 trainers at level 40

Cinderace3.52
Tyranitar3.49
Hydreigon3.53
Rampardos3.60
Volcarona3.59
Eternatus3.61

The party these numbers assume

1. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

2. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

3. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

4. Necrozma (Dawn Wings)

Metal Claw + Moongeist Beam

5. Blacephalon

Astonish + Mind Blown

6. Metagross

Fury Cutter + Meteor Mash

See the full ranked counter list for Mr. Rime · 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.