Realmbreaker is the 40th most-used weapon under the current filters (0.8% of 848,147 recorded fights), winning 55.3% overall - 7.5% of its wins come against better-geared opponents.
Best against Nature Staff (100.0%), Enigmatic Staff (100.0%), Redemption Staff (97.8%). Struggles against Bloodmoon Staff (17.2%), Rift Glaive (24.2%), Siegebow (25.0%).
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.