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 1 to be safe — 1 if everyone is prepared

At level 40, a party of Sandile's top six counters needs 0.76 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.91 (round up: 1). The raid timer is 300 seconds and one prepared trainer alone would take 3:29. A prepared solo becomes possible at level 25. A duo works from level 20.

Sandile · Tier 5

grounddark

Weak to

fightingbugwatergrassicefairy

Boss CP: 16,500
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 Sandile 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	1(0.97)	2(1.10)	2(1.27)	5:05	6.0
Level 25	1(0.85)	1(0.94)	2(1.11)	4:18	5.8
Level 30	1(0.75)	1(0.82)	1(0.99)	3:47	5.2
Level 35	1(0.72)	1(0.79)	1(0.95)	3:37	4.9
Level 40	1(0.69)	1(0.76)	1(0.91)	3:29	4.6
Level 45	1(0.67)	1(0.73)	1(0.88)	3:22	4.3
Level 50	1(0.65)	1(0.71)	1(0.85)	3:15	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.

1 trainer at level 40

Kyurem (White)0.69

A prepared party

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

1 trainer at level 40

Kyurem (White)0.69
Keldeo0.69
Kyurem (Black)0.77
Kartana0.80
Terrakion0.80
Lucario0.80

A mixed local group

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

1 trainer at level 40

Hisuian Decidueye0.89
Enamorus (Incarnate)0.89
Tapu Bulu0.90
Conkeldurr0.90
Zarude0.91
Breloom0.91

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Keldeo

Low Kick + Secret Sword

3. Kyurem (Black)

Dragon Tail + Freeze Shock

4. Kartana

Fury Cutter + Sacred Sword

5. Terrakion

Double Kick + Sacred Sword

6. Lucario

Force Palm + Aura Sphere

See the full ranked counter list for Sandile · 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.