Heavy Crossbow is the 23rd most-used weapon under the current filters (1.3% of 953,491 recorded fights), winning 56.8% overall - 4.8% of its wins come against better-geared opponents.
Best against Ironroot Staff (95.8%), Great Holy Staff (94.7%), Great Arcane Staff (92.3%). Struggles against Flamewalker Staff (27.1%), Arclight Blasters (28.7%), Glaive (30.2%).
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.