Dagger is the 24th most-used weapon under the current filters (1.2% of 519,561 recorded fights), winning 52.9% overall - 10.2% of its wins come against better-geared opponents.
Best against Great Holy Staff (88.0%), Holy Staff (83.2%), Lifetouch Staff (82.4%). Struggles against Lightcaller (22.2%), Prowling Staff (23.6%), Phantom Twinblade (25.5%).
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.