Phantom Twinblade is the 24th most-used weapon under the current filters (1.3% of 718,438 recorded fights), winning 63.0% overall - 2.6% of its wins come against better-geared opponents.
Best against Redemption Staff (97.1%), Nature Staff (95.8%), Great Nature Staff (95.5%). Struggles against Arclight Blasters (40.5%), Crystal Reaper (41.5%), Claymore (42.1%).
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.