I was able to 5* and train Xander to level 40 just in time for the season to begin.
Xander (Siegfried, Swap, Blazing Light, Fury 2, Vantage 3, Hone Cavalry, Spd +1)
Reinhardt (Dire Thunder, Reposition, Draconic Aura, DB3, Vantage 3, Goad Cavalry)
Gordin (Brave Bow+, Draw Back, Moonbow, Atk +3, Swordbreaker 3, Fortify Def 3, Atk +1)
Hector +2 (Armads, Swap, Bonfire, Distant Counter, Vantage 3, Hone Atk 3, HP+3)
I was able to hit 4820 points with this team in a deathless run which puts me at Rank 920 in Tier 17.
The last fight was pretty rough tbh. I was against a team of Julia, Reinhardt, Azura, and Eldigan on the map with a bunch of forests in the middle.. The player I was against didn't put any Assist skills on anyone other than Azura so I had to be really careful on how to split up the team so that I didn't get blitzed down by a Reinhardt with 5 or 6 Mov. I could definitely feel the pain of forest restrictions on my cavalry units here, but with some careful kiting, I was able to dispatch all the mages before they could get the jump on me. Phew.