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 — 1 if everyone is prepared

At level 40, a party of Lampent's top six counters needs 0.87 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 1.02 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 2:34. A prepared solo becomes possible at level 30. A duo works from level 20.

Lampent · Shadow Tier 3

ghostfire

Weak to

groundrockghostwaterdark

Boss CP: 13,268
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 Lampent 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(1.08)	2(1.34)	2(1.53)	3:56	6.0
Level 25	1(0.93)	2(1.11)	2(1.29)	3:15	5.9
Level 30	1(0.81)	1(0.99)	2(1.13)	2:55	5.5
Level 35	1(0.73)	1(0.93)	2(1.07)	2:44	5.1
Level 40	1(0.72)	1(0.87)	2(1.02)	2:34	4.6
Level 45	1(0.68)	1(0.85)	1(0.99)	2:29	4.2
Level 50	1(0.64)	1(0.82)	1(0.96)	2:24	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.

1 trainer at level 40

Necrozma (Dawn Wings)0.72

A prepared party

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

1 trainer at level 40

Necrozma (Dawn Wings)0.72
Landorus (Therian)0.86
Inteleon0.90
Blacephalon0.91
Darkrai0.92
Groudon0.94

A mixed local group

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

2 trainers at level 40

Glimmora0.99
Gengar0.98
Rampardos0.99
Dragapult1.00
Quaquaval1.01
Giratina (Origin)1.01

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Landorus (Therian)

Mud Shot + Sandsear Storm

3. Inteleon

Water Gun + Hydro Cannon

4. Blacephalon

Astonish + Shadow Ball

5. Darkrai

Snarl + Foul Play

6. Groudon

Mud Shot + Precipice Blades

See the full ranked counter list for Lampent · 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.