Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 4 if everyone is prepared
- Boss CP
- 32,837
- Boss HP
- 15,000
- Raid timer
- 300s
- Party used
- 6
Trainers needed, by attacker level
Scroll sideways for the mixed-lobby column.
| Attacker level | Six of the best counter | A prepared party | A mixed local group | Prepared solo time | Faints per timer |
|---|---|---|---|---|---|
| Level 20 | 5(4.30) | 6(5.17) | 6(5.93) | 24:25 | 6.0 |
| Level 25 | 4(3.36) | 5(4.23) | 5(4.94) | 19:59 | 5.9 |
| Level 30 | 4(3.09) | 4(3.76) | 5(4.32) | 17:46 | 5.9 |
| Level 35 | 3(2.90) | 4(3.49) | 5(4.03) | 16:28 | 5.9 |
| Level 40 | 3(2.76) | 4(3.29) | 4(3.85) | 15:32 | 5.9 |
| Level 45 | 3(2.70) | 4(3.19) | 4(3.72) | 15:03 | 5.9 |
| Level 50 | 3(2.58) | 4(3.07) | 4(3.62) | 14:29 | 5.9 |
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.
3 trainers at level 40
- Necrozma (Dawn Wings)2.76
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)2.76
- Kartana3.26
- Zeraora3.38
- Regieleki3.38
- Xurkitree3.45
- Thundurus (Therian)3.50
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Blacephalon3.65
- Tyranitar3.71
- Hydreigon3.74
- Meowscarada3.74
- Eternatus3.81
- Dragapult3.86
The party these numbers assume
See the full ranked counter list for Slowbro · 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.