Brief topic derail from ancient history … if you are using a TC to bank food, use TC20 or TC12 , not TC13.
If you want new 4* and 5* heroes in addition to banking food, use TC20.
If you don’t need TC20 heroes, TC12 banks food with the least ham and recruit wastage per day while producing expensive 3*s as food. It is better than TC13 or TC20 that way.