I was requested to show a video of how to auto farm this week's Domains.
Notes:
If you have Bow Hinoka, she will likely kill Katarina and a Niles will spawn on the fort, you will require a flying dancer at that point to destroy the fort before auto ends your second turn. Bow Hinoka should be able to kill a fort-buffed Niles with Iceberg ready (from Katarina charging it once, and Hinoka countering twice). You can replace the ranged flier with any ranged flier so long as they survive Katarina's attacks and don't kill her OR you have a flying dancer if they do kill her because of Niles spawning after.
I have yet to test this but, a melee flier and 2 ranged WoMs should work as well. The melee flier should end up in the same spot as Summer Tana and be able to survive, they will then attack Katarina and (preferably) kill her, be danced for, move in to attack the fort, and the 2 ranged WoMs should finish it. If Katarina doesn't die, hope that the melee flier moves 1 down and 1 right for both ranged WoMs to finish the fort.