× I suggest first to kill as many goblins as possible before the first spawn, after that you can repair at (19,18) (18,18)

× After a while that place will be not safe so you have to move at (27,17). The hard part of the room is that when you change position (click on the orb that the bomb will "strike" and think of where you can go next) while doing it try to use brained roach manipulation to kill as many as possible.