I was building Cruetraxa to sub for Rotos in DT and dungeons when Rotos is wrong affinity. And started testing her build in Arena just for fun. 

Everybody knows she's primarily a single target nuker with marinal utility. However, there is some utility in her hard hitting A1 when going against teams with Stoneskin UDK. 

UDK blocks one hit, that's his job in those teams (especially when they sport a Duchess to mitigate AOE damage). Cruetraxa's first hit is wasted on Stoneskin, but 3 hits still go to her intended target. I took out a few Duchesses through UDK's passive. Seems like a niche use, but I come across stoneskin UDK teams often enough to notice.