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 Centiskorch's top six counters needs 2.12 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.74 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:45. No level in this range makes it soloable with a prepared party. A duo works from level 50.

Centiskorch · Elite

firebug

Weak to

rockflyingwater

Boss CP: 43,712
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 Centiskorch 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(2.96)	4(3.12)	5(4.09)	14:22	6.0
Level 25	3(2.54)	3(2.68)	4(3.42)	12:21	6.0
Level 30	3(2.21)	3(2.35)	4(3.01)	10:50	6.0
Level 35	3(2.14)	3(2.24)	3(2.87)	10:17	6.0
Level 40	3(2.00)	3(2.12)	3(2.74)	9:45	6.0
Level 45	2(1.96)	3(2.03)	3(2.64)	9:20	6.0
Level 50	2(1.85)	2(1.94)	3(2.54)	8:57	6.0

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.

3 trainers at level 40

Glimmora2.00

A prepared party

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

3 trainers at level 40

Glimmora2.00
Rampardos2.00
Rhyperior2.10
Terrakion2.16
Tyrantrum2.21
Gigalith2.23

A mixed local group

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

3 trainers at level 40

Aggron2.58
Lycanroc (Dusk)2.60
Landorus (Incarnate)2.62
Stakataka2.67
Lycanroc (Midday)2.68
Omastar2.75

The party these numbers assume

1. Glimmora

Rock Throw + Meteor Beam

2. Rampardos

Smack Down + Rock Slide

3. Rhyperior

Smack Down + Rock Wrecker

4. Terrakion

Smack Down + Rock Slide

5. Tyrantrum

Rock Throw + Meteor Beam

6. Gigalith

Lock-On + Meteor Beam

See the full ranked counter list for Centiskorch · 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.