Hellspawn Staff is the 34th most-used weapon under the current filters (1.0% of 163,764 recorded fights), winning 66.5% overall - 5.1% of its wins come against better-geared opponents.
Best against Blight Staff (96.3%), Holy Staff (95.7%), Hallowfall (93.5%). Struggles against Arclight Blasters (21.7%), Prowling Staff (27.3%), Bloodletter (29.2%).
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.