Great Cursed Staff is the 124th most-used weapon under the current filters (0.1% of 1,226,348 recorded fights), winning 33.1% overall - 22.3% of its wins come against better-geared opponents.
Best against Greataxe (65.0%), Bloodletter (37.5%), Battleaxe (33.3%). Struggles against Bear Paws (13.5%), Carving Sword (20.0%), Cursed Staff (20.0%).
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.