Hellspawn Staff is the 12th most-used weapon under the current filters (1.9% of 274,551 recorded fights), winning 70.4% overall - 3.8% of its wins come against better-geared opponents.
Best against Ironroot Staff (100.0%), Redemption Staff (95.4%), Hallowfall (95.1%). Struggles against Rotcaller Staff (38.2%), Hellfire Hands (43.1%), Bow (44.7%).
Winrate by IP difference (50-IP buckets, dot size = sample size). A flat curve means the weapon carries regardless of gear; a steep one means it only wins when out-gearing.