Hellspawn Staff is the 12th most-used weapon under the current filters (2.1% of 280,006 recorded fights), winning 70.5% overall - 4.1% of its wins come against better-geared opponents.
Best against Great Holy Staff (100.0%), Double Bladed Staff (96.9%), Hallowfall (95.9%). Struggles against Hellfire Hands (38.6%), Lightcaller (42.2%), Prowling Staff (43.2%).
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.