Group size estimator
How many trainers do I need to invite?
Invite 5 to be safe — 4 if everyone is prepared
- Boss CP
- 52,015
- Boss HP
- 20,000
- 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(4.05) | 5(4.62) | 6(5.65) | 21:14 | 6.0 |
| Level 25 | 4(3.59) | 5(4.09) | 6(5.06) | 18:50 | 5.6 |
| Level 30 | 4(3.22) | 4(3.69) | 5(4.52) | 16:58 | 5.4 |
| Level 35 | 4(3.09) | 4(3.52) | 5(4.24) | 16:13 | 4.9 |
| Level 40 | 3(2.94) | 4(3.35) | 5(4.09) | 15:25 | 4.7 |
| Level 45 | 3(2.84) | 4(3.27) | 4(3.99) | 15:02 | 4.5 |
| Level 50 | 3(2.75) | 4(3.17) | 4(3.84) | 14:36 | 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.
3 trainers at level 40
- Blacephalon2.94
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
4 trainers at level 40
- Blacephalon2.94
- Keldeo3.14
- Lucario3.41
- Landorus (Therian)3.48
- Reshiram3.55
- Terrakion3.59
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
5 trainers at level 40
- Darmanitan (Standard)4.03
- Groudon4.02
- Heatran4.06
- Quaquaval4.06
- Kartana4.08
- Conkeldurr4.09
The party these numbers assume
See the full ranked counter list for Iron Treads · 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.