Kingmaker is the 23rd most-used weapon under the current filters (1.1% of 73,137 recorded fights), winning 55.9% overall - 5.9% of its wins come against better-geared opponents.
Best against Hallowfall (100.0%), Realmbreaker (55.6%), Spiked Gauntlets (52.2%). Struggles against Galatine Pair (26.1%), Battle Bracers (35.3%), Bloodletter (42.3%).
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.