Hellspawn Staff is the 35th most-used weapon under the current filters (0.8% of 151,151 recorded fights), winning 66.9% overall - 4.8% of its wins come against better-geared opponents.
Best against Hallowfall (100.0%), Holy Staff (93.1%), Fire Staff (76.2%). Struggles against Bow (40.0%), Claymore (43.8%), Phantom Twinblade (46.7%).
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.