Rotcaller Staff is the 68th most-used weapon under the current filters (0.4% of 440,058 recorded fights), winning 57.2% overall - 5.8% of its wins come against better-geared opponents.
Best against Redemption Staff (94.5%), Heavy Mace (93.5%), Battleaxe (90.5%). Struggles against Bow (20.0%), Arclight Blasters (24.0%), Whispering Bow (30.6%).
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.
