Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 45,727
- 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 | 4(3.54) | 5(4.16) | 6(5.23) | 19:10 | 6.0 |
| Level 25 | 3(2.95) | 4(3.40) | 5(4.31) | 15:38 | 6.0 |
| Level 30 | 3(2.46) | 3(2.98) | 4(3.72) | 13:42 | 6.0 |
| Level 35 | 3(2.33) | 3(2.75) | 4(3.53) | 12:39 | 6.0 |
| Level 40 | 3(2.22) | 3(2.65) | 4(3.36) | 12:11 | 5.9 |
| Level 45 | 3(2.14) | 3(2.54) | 4(3.21) | 11:40 | 5.9 |
| Level 50 | 3(2.08) | 3(2.46) | 4(3.12) | 11:18 | 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
- Rayquaza2.22
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Rayquaza2.22
- Enamorus (Incarnate)2.63
- Yveltal2.66
- Toucannon2.73
- Galarian Articuno2.74
- Salamence2.90
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Hisuian Braviary3.14
- Galarian Zapdos3.25
- Tornadus (Incarnate)3.27
- Galarian Moltres3.31
- Flamigo3.33
- Unfezant3.33
The party these numbers assume
See the full ranked counter list for Virizion · 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.