Astral Staff is the 101st most-used weapon under the current filters (0.2% of 481,689 recorded fights), winning 52.8% overall - 5.6% of its wins come against better-geared opponents.
Best against Hallowfall (96.2%), Carving Sword (57.7%), Longbow (48.1%). Struggles against Bloodletter (28.6%), Phantom Twinblade (31.3%), Bear Paws (39.5%).
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.
