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 5 to be safe — 4 if everyone is prepared

At level 40, a party of Runerigus's top six counters needs 3.89 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.72 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 17:54. No level in this range makes it soloable with a prepared party.

Runerigus · Elite

groundghost

Weak to

ghostwatergrassicedark

Boss CP: 39,960
Boss HP: 20,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Runerigus 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	7(6.71)	7(6.05)	8(7.05)	27:50	6.0
Level 25	7(6.10)	6(5.03)	6(5.92)	23:08	6.0
Level 30	6(5.13)	5(4.49)	6(5.16)	20:39	6.0
Level 35	4(3.79)	5(4.08)	5(4.96)	18:47	6.0
Level 40	4(3.52)	4(3.89)	5(4.72)	17:54	6.0
Level 45	4(3.36)	4(3.71)	5(4.51)	17:05	6.0
Level 50	4(3.12)	4(3.57)	5(4.37)	16:25	6.0

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.

4 trainers at level 40

Necrozma (Dawn Wings)3.52

A prepared party

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

4 trainers at level 40

Necrozma (Dawn Wings)3.52
Kyurem (White)3.54
Kyurem (Black)3.67
Kartana4.14
Darkrai4.16
Inteleon4.31

A mixed local group

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

5 trainers at level 40

Quaquaval4.69
Giratina (Origin)4.68
Hisuian Zoroark4.70
Tyranitar4.70
Crawdaunt4.68
Meowscarada4.70

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Kyurem (White)

Ice Fang + Ice Burn

3. Kyurem (Black)

Shadow Claw + Freeze Shock

4. Kartana

Razor Leaf + Leaf Blade

5. Darkrai

Snarl + Foul Play

6. Inteleon

Water Gun + Hydro Cannon

See the full ranked counter list for Runerigus · 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.