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 Paras's top six counters needs 0.65 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.78 (round up: 1). The raid timer is 300 seconds and one prepared trainer alone would take 3:00. A prepared solo becomes possible at level 20. A duo works from level 20.

Paras · Tier 5

buggrass

Weak to

flyingfirepoisonrockbugice

Boss CP: 17,784
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 Paras 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(0.77)	1(0.89)	2(1.09)	4:06	4.9
Level 25	1(0.66)	1(0.78)	1(0.95)	3:35	3.6
Level 30	1(0.60)	1(0.71)	1(0.86)	3:15	2.6
Level 35	1(0.57)	1(0.68)	1(0.81)	3:07	2.3
Level 40	1(0.55)	1(0.65)	1(0.78)	3:00	1.9
Level 45	1(0.53)	1(0.63)	1(0.76)	2:54	1.8
Level 50	1(0.51)	1(0.61)	1(0.74)	2:49	1.6

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

Blacephalon0.55

A prepared party

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

1 trainer at level 40

Blacephalon0.55
Rayquaza0.60
Reshiram0.66
Salamence0.68
Moltres0.70
Yveltal0.72

A mixed local group

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

1 trainer at level 40

Blaziken0.75
Heatran0.76
Enamorus (Incarnate)0.76
Tornadus (Therian)0.77
Ho-Oh0.78
Delphox0.78

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Rayquaza

Air Slash + Dragon Ascent

3. Reshiram

Fire Fang + Fusion Flare

4. Salamence

Fire Fang + Fly

5. Moltres

Fire Spin + Fly

6. Yveltal

Gust + Oblivion Wing

See the full ranked counter list for Paras · 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.