Hellspawn Staff is the 19th most-used weapon under the current filters (1.5% of 80,549 recorded fights), winning 67.7% overall - 3.7% of its wins come against better-geared opponents.
Best against Blight Staff (100.0%), Holy Staff (96.4%), Hallowfall (92.3%). Struggles against Phantom Twinblade (27.3%), Bear Paws (38.7%), Claymore (40.9%).
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.