Dagger is the 30th most-used weapon under the current filters (1.1% of 1,226,062 recorded fights), winning 50.6% overall - 10.5% of its wins come against better-geared opponents.
Best against Great Arcane Staff (75.0%), Soulscythe (72.7%), Fire Staff (65.0%). Struggles against Dawnsong (16.2%), Flamewalker Staff (18.5%), Trinity Spear (22.2%).
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.