Okay, great, B!Tharja already show she'll be a great focus for the next season, since I'm using my trio of arena plus her for the TT.
On another note, I tried with another team for this week's arena. Around 694 points, and the first three matchs have Magic!Reinhardt in my opposent team (and two Horse Emblem). Win all match, but got some death. Well, I don't care, since there are no ranking rewards anymore outside of tier ranking, and I'm already sure I'll drop down to 19, since even my best team cannot score the points I need to stay. So.... meh.