fire keep mortars
mortars arent meant for doors lol, they are meant to counter trebs and catas
If you don’t know how to use mortars to take out rams you’re not using them fully. The mortars I’m referring to here are placed either side of the 4 doors used to access the lords room, I can’t see to many trebs or catas being built to open these doors. Maybe I missed a wall you could take out to enter the lords room, in which case a cata might get built, but I can’t see that happening too often.