Infernal Staff is the 67th most-used weapon under the current filters (0.5% of 593,950 recorded fights), winning 51.1% overall - 8.2% of its wins come against better-geared opponents.
Best against Hallowfall (90.5%), Holy Staff (81.0%), Cursed Staff (74.2%). Struggles against Arclight Blasters (23.8%), Energy Shaper (30.0%), Frost Staff (32.6%).
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.