Mathilda Fodde For Who

Ridersbane works well with lance units you like in AA but aren’t sure what to do with. Beyond that, there’s gimmicky arena builds and not much else.

Cancel affinity works well with any colorless unit you don’t want to have screwed by the classic TA Raven combo, and makes any user of it laugh when a max merged TA Raven Cecilia tries to attack them, just to be slaughtered. There are other non-conventional uses of it on units that may face regular oppression from various TA users (like reds that may be near a TA Nowi), but colorless units like bridal Cordelia or Brave Lyn make the best use of it.

If you are like me, you could always keep her and try to build her even if she isn't rated well, especially if you only have one copy of her. (I like to keep at least one copy of every hero as a 5-Star.) Who knows? She could be useful in one of your Arena Assault runs, or she might get a refine some time down the road.

But if you don't care for Mathilda at all, Cancel Affinity is pretty useful on offensive colorless units. The best units would be someone like B!Lyn or B!Cordelia with Firesweep Bow+ or Brave Bow+. If you have Alm with Falchion-refine, you can K.O. Triangle Adept Nowi if you give him CA. That being said, your NY!Takumi might not be a bad candidate either since he has the Res stat to bait mages, especially with the Res boon; with CA, he won't have to have to fear Triangle Adept + -Raven tome users.