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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Servine's top six counters needs 2.52 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.11 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 11:55. No level in this range makes it soloable with a prepared party.

Servine · Shadow Tier 5

grass

Weak to

flyingpoisonbugfireice

Boss CP: 21,683
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 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(3.55)	4(3.50)	5(4.34)	16:33	5.6
Level 25	3(2.90)	4(3.05)	4(3.82)	14:24	5.3
Level 30	3(2.67)	3(2.75)	4(3.45)	12:59	4.9
Level 35	3(2.47)	3(2.66)	4(3.23)	12:34	4.5
Level 40	3(2.38)	3(2.52)	4(3.11)	11:55	4.3
Level 45	3(2.27)	3(2.45)	4(3.02)	11:34	4.2
Level 50	3(2.19)	3(2.38)	3(2.90)	11:13	4.0

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

Blacephalon2.38

A prepared party

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

3 trainers at level 40

Blacephalon2.38
Kyurem (White)2.42
Rayquaza2.51
Eternatus2.51
Kyurem (Black)2.59
Reshiram2.73

A mixed local group

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

4 trainers at level 40

Cinderace3.02
Volcarona3.02
Galarian Articuno3.04
Chandelure3.07
Naganadel3.09
Zacian (Crowned Sword)3.12

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.