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 2 to be safe — 2 if everyone is prepared

At level 40, a party of Rellor's top six counters needs 1.12 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.32 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 5:09. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Rellor · Tier 5

bug

Weak to

flyingrockfire

Boss CP: 13,718
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 Rellor 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	2(1.35)	2(1.53)	2(1.83)	7:02	4.7
Level 25	2(1.21)	2(1.36)	2(1.60)	6:15	4.1
Level 30	2(1.06)	2(1.22)	2(1.44)	5:37	3.5
Level 35	2(1.01)	2(1.17)	2(1.38)	5:23	3.2
Level 40	1(0.96)	2(1.12)	2(1.32)	5:09	3.0
Level 45	1(0.93)	2(1.09)	2(1.28)	5:01	2.8
Level 50	1(0.91)	2(1.06)	2(1.24)	4:51	2.5

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

Blacephalon0.96

A prepared party

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

2 trainers at level 40

Blacephalon0.96
Rayquaza1.04
Reshiram1.13
Salamence1.17
Enamorus (Incarnate)1.21
Moltres1.21

A mixed local group

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

2 trainers at level 40

Darmanitan (Standard)1.29
Blaziken1.30
Tornadus (Therian)1.30
Zacian (Crowned Sword)1.31
Galarian Articuno1.32
Rampardos1.32

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Rayquaza

Air Slash + Dragon Ascent

3. Reshiram

Fire Fang + Fusion Flare

4. Salamence

Fire Fang + Fly

5. Enamorus (Incarnate)

Fairy Wind + Fly

6. Moltres

Fire Spin + Fly

See the full ranked counter list for Rellor · 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.