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 5 to be safe — 5 if everyone is prepared

At level 40, a party of Mega Chandelure's top six counters needs 4.05 trainers (round up: 5), and a mixed lobby of ranks 13-24 needs 4.50 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 18:49. No level in this range makes it soloable with a prepared party.

Mega Chandelure · Primal

ghostfire

Weak to

groundrockghostwaterdark

Boss CP: 81,670
Boss HP: 22,500
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Chandelure 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	7(6.19)	7(6.28)	8(7.40)	29:11	6.0
Level 25	5(4.78)	6(5.04)	6(5.94)	23:26	6.0
Level 30	5(4.44)	5(4.51)	6(5.05)	20:58	6.0
Level 35	5(4.02)	5(4.26)	5(4.74)	19:48	6.0
Level 40	4(3.95)	5(4.05)	5(4.50)	18:49	6.0
Level 45	4(3.85)	4(3.92)	5(4.30)	18:14	6.0
Level 50	4(3.78)	4(3.78)	5(4.10)	17:35	5.9

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.

4 trainers at level 40

Hydreigon3.95

A prepared party

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

5 trainers at level 40

Hydreigon3.95
Eternatus3.94
Tyranitar4.03
Glimmora4.10
Kyogre4.18
Necrozma (Dawn Wings)4.09

A mixed local group

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

5 trainers at level 40

Landorus (Therian)4.39
Garchomp4.40
Tyrantrum4.46
Hisuian Samurott4.40
Incineroar4.47
Salamence4.48

The party these numbers assume

1. Hydreigon

Bite + Brutal Swing

2. Eternatus

Dragon Tail + Dynamax Cannon

3. Tyranitar

Bite + Brutal Swing

4. Glimmora

Rock Throw + Meteor Beam

5. Kyogre

Waterfall + Origin Pulse

6. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

See the full ranked counter list for Mega Chandelure · 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.