Astral Staff is the 96th most-used weapon under the current filters (0.2% of 311,253 recorded fights), winning 48.4% overall - 7.1% of its wins come against better-geared opponents.
Best against Carving Sword (50.0%), Bow of Badon (47.6%), Longbow (45.0%). Struggles against Phantom Twinblade (31.8%), Bear Paws (37.5%), Longbow (45.0%).
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.