Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 4 if everyone is prepared
- Boss CP
- 38,769
- 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(4.53) | 5(4.94) | 6(5.70) | 23:20 | 6.0 |
| Level 25 | 4(3.38) | 5(4.04) | 5(4.97) | 19:05 | 6.0 |
| Level 30 | 4(3.02) | 4(3.48) | 5(4.36) | 16:25 | 6.0 |
| Level 35 | 3(2.95) | 4(3.31) | 5(4.05) | 15:39 | 6.0 |
| Level 40 | 3(2.85) | 4(3.14) | 4(3.83) | 14:51 | 6.0 |
| Level 45 | 3(2.63) | 4(3.01) | 4(3.72) | 14:14 | 6.0 |
| Level 50 | 3(2.51) | 3(2.88) | 4(3.59) | 13:37 | 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.
3 trainers at level 40
- Keldeo2.85
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
4 trainers at level 40
- Keldeo2.85
- Landorus (Therian)3.10
- Lucario3.15
- Kartana3.20
- Terrakion3.22
- Blaziken3.33
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Latios3.71
- Garchomp3.67
- Hisuian Decidueye3.73
- Kyurem (Black)3.78
- Landorus (Incarnate)3.78
- Excadrill3.82
The party these numbers assume
See the full ranked counter list for Heliolisk · 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.