Realmbreaker is the 5th most-used weapon under the current filters (4.5% of 60,131 recorded fights), winning 63.7% overall - 5.6% of its wins come against better-geared opponents.
Best against Fallen Staff (100.0%), Redemption Staff (100.0%), Hallowfall (98.0%). Struggles against Rift Glaive (25.0%), Demonfang (29.2%), Permafrost Prism (29.8%).
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.