Bloodletter is the 5th most-used weapon under the current filters (3.0% of 407,264 recorded fights), winning 61.3% overall - 19.5% of its wins come against better-geared opponents.
Best against Occult Staff (96.0%), Wild Staff (95.0%), Nature Staff (94.5%). Struggles against Twin Slayers (28.6%), Flamewalker Staff (31.3%), Bear Paws (32.4%).
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.
