Hellspawn Staff is the 12th most-used weapon under the current filters (2.1% of 325,161 recorded fights), winning 70.5% overall - 4.0% of its wins come against better-geared opponents.
Best against Ironroot Staff (100.0%), Great Holy Staff (100.0%), Nature Staff (100.0%). Struggles against Arctic Staff (36.4%), Demonic Staff (42.2%), Bow (43.8%).
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.