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 Lampent's top six counters needs 1.28 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.48 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 5:53. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Lampent · Tier 5

ghostfire

Weak to

groundrockghostwaterdark

Boss CP: 25,694
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 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(1.45)	2(1.89)	3(2.10)	8:41	6.0
Level 25	2(1.29)	2(1.58)	2(1.81)	7:15	6.0
Level 30	2(1.16)	2(1.40)	2(1.62)	6:28	6.0
Level 35	2(1.09)	2(1.35)	2(1.54)	6:13	5.9
Level 40	2(1.05)	2(1.28)	2(1.48)	5:53	5.9
Level 45	2(1.00)	2(1.23)	2(1.42)	5:39	5.9
Level 50	1(0.94)	2(1.19)	2(1.37)	5:27	5.7

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.

2 trainers at level 40

Necrozma (Dawn Wings)1.05

A prepared party

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

2 trainers at level 40

Necrozma (Dawn Wings)1.05
Blacephalon1.27
Landorus (Therian)1.28
Darkrai1.33
Inteleon1.34
Kyogre1.39

A mixed local group

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

2 trainers at level 40

Dragapult1.43
Rampardos1.45
Quaquaval1.45
Eternatus1.47
Tyranitar1.45
Absol1.47

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Blacephalon

Astonish + Shadow Ball

3. Landorus (Therian)

Mud Shot + Sandsear Storm

4. Darkrai

Snarl + Foul Play

5. Inteleon

Water Gun + Hydro Cannon

6. Kyogre

Waterfall + Origin Pulse

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.