Mathilda/Berku Build Suggestions

....Abort! Abort! Abort!

...Berkut is a good holder of Brave Lance+ amongst cavalry units due to his high attack compared to other mounted lancers. His speed is too bad to consider salvaging anyways.

...Mathilda is res-tanky, but the lack of red mages in the meta hurts her best matchup. She can still be used to blow up the likes of Reinhardt with her weapon if given suitable buffs, but without Distant Counter she has to wait for the player phase after he moves in to take him down. Since Mathilda is somewhat brittle (poor HP and Def for a lancer) having to send her in to kill something isn't very convenient in most cases. She will require babysitting, and whether she awards you for the trouble depends on how many horse teams you run into (Reinhardt specific counter is a job better left to green mages or Titania, so that doesn't seem to validate her usage).

Oh, and Brash Assault won't work on her. Her already low health and defense nearly guarantee she will die to the counterattack if she engages something in close combat at HP <50%, so her second attack won't come.