Kingmaker is the 29th most-used weapon under the current filters (1.0% of 97,096 recorded fights), winning 61.8% overall - 5.8% of its wins come against better-geared opponents.
Best against Hallowfall (90.5%), Holy Staff (90.2%), Battleaxe (71.9%). Struggles against Bow (35.0%), Bow of Badon (50.0%), Bear Paws (55.8%).
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.