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 Servine's top six counters needs 1.00 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.23 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 2:56. A prepared solo becomes possible at level 45. A duo works from level 20.

Servine · Shadow Tier 3

grass

Weak to

flyingpoisonbugfireice

Boss CP: 11,197
Boss HP: 4,000
Raid timer: 180s
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	2(1.33)	2(1.38)	2(1.72)	4:02	4.1
Level 25	2(1.15)	2(1.21)	2(1.51)	3:32	3.3
Level 30	2(1.02)	2(1.09)	2(1.34)	3:12	2.7
Level 35	1(0.99)	2(1.04)	2(1.28)	3:03	2.5
Level 40	1(0.93)	2(1.00)	2(1.23)	2:56	2.3
Level 45	1(0.86)	1(0.96)	2(1.20)	2:49	2.1
Level 50	1(0.85)	1(0.93)	2(1.15)	2:44	1.9

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.

1 trainer at level 40

Blacephalon0.93

A prepared party

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

2 trainers at level 40

Blacephalon0.93
Kyurem (White)0.95
Rayquaza0.99
Eternatus1.00
Kyurem (Black)1.08
Reshiram1.08

A mixed local group

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

2 trainers at level 40

Pheromosa1.18
Volcarona1.19
Chandelure1.22
Galarian Articuno1.20
Naganadel1.21
Darmanitan (Standard)1.23

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.