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 Servine's top six counters needs 2.39 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.94 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 11:01. No level in this range makes it soloable with a prepared party.

Servine · Elite

grass

Weak to

flyingpoisonbugfireice

Boss CP: 25,037
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 Servine 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(3.39)	4(3.34)	5(4.10)	15:22	5.7
Level 25	3(2.73)	3(2.90)	4(3.58)	13:22	5.3
Level 30	3(2.48)	3(2.60)	4(3.23)	11:57	4.9
Level 35	3(2.36)	3(2.52)	4(3.08)	11:35	4.5
Level 40	3(2.25)	3(2.39)	3(2.94)	11:01	4.3
Level 45	3(2.15)	3(2.32)	3(2.85)	10:40	4.2
Level 50	3(2.06)	3(2.24)	3(2.76)	10:20	4.1

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

Blacephalon2.25

A prepared party

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

3 trainers at level 40

Blacephalon2.25
Kyurem (White)2.32
Rayquaza2.37
Eternatus2.43
Kyurem (Black)2.48
Reshiram2.52

A mixed local group

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

3 trainers at level 40

Toucannon2.85
Pheromosa2.86
Galarian Articuno2.89
Volcarona2.92
Zacian (Crowned Sword)2.92
Naganadel2.95

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Kyurem (White)

Ice Fang + Ice Burn

3. Rayquaza

Air Slash + Dragon Ascent

4. Eternatus

Poison Jab + Dynamax Cannon

5. Kyurem (Black)

Dragon Tail + Freeze Shock

6. Reshiram

Fire Fang + Fusion Flare

See the full ranked counter list for Servine · 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.