Astral Staff is the 101st most-used weapon under the current filters (0.2% of 446,493 recorded fights), winning 52.3% overall - 5.5% of its wins come against better-geared opponents.
Best against Hallowfall (96.0%), Longbow (48.0%), Bow of Badon (45.7%). Struggles against Bloodletter (28.6%), Phantom Twinblade (30.4%), Galatine Pair (40.9%).
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.