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 Archeops's top six counters needs 0.90 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 1.21 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 2:39. A prepared solo becomes possible at level 30. A duo works from level 20.

Archeops · Shadow Tier 3

rockflying

Weak to

rocksteelwaterelectricice

Boss CP: 24,095
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 Archeops 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(1.17)	2(1.50)	2(1.81)	4:23	5.8
Level 25	1(0.95)	2(1.13)	2(1.54)	3:18	5.4
Level 30	1(0.83)	1(0.98)	2(1.35)	2:53	4.9
Level 35	1(0.78)	1(0.94)	2(1.28)	2:44	4.6
Level 40	1(0.79)	1(0.90)	2(1.21)	2:39	4.5
Level 45	1(0.76)	1(0.87)	2(1.17)	2:33	4.3
Level 50	1(0.70)	1(0.84)	2(1.14)	2:28	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

Zacian (Crowned Sword)0.79

A prepared party

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

1 trainer at level 40

Zacian (Crowned Sword)0.79
Zamazenta (Crowned Shield)0.78
Necrozma (Dusk Mane)0.84
Kyurem (White)0.92
Kyurem (Black)1.03
Xurkitree1.06

A mixed local group

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

2 trainers at level 40

Kyogre1.17
Dialga (Origin)1.19
Necrozma (Dawn Wings)1.20
Empoleon1.20
Eternatus1.20
Quaquaval1.21

The party these numbers assume

1. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

2. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

3. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

4. Kyurem (White)

Steel Wing + Ice Burn

5. Kyurem (Black)

Dragon Tail + Freeze Shock

6. Xurkitree

Thunder Shock + Discharge

See the full ranked counter list for Archeops · 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.