Great Cursed Staff is the 124th most-used weapon under the current filters (0.1% of 789,714 recorded fights), winning 34.0% overall - 20.5% of its wins come against better-geared opponents.
Best against Battleaxe (40.9%), Dual Swords (30.4%), Longbow (28.6%). Struggles against Bear Paws (8.3%), Longbow (28.6%), Dual Swords (30.4%).
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.
