I also talk to the set designer and lighting technician. Principally, I need to ensure that the actors can move around the stage, can see each other’s movements, and that they won’t slip or fall. The actors need to be able see the swords as they fight. Losing sight of the blade in a beautiful sidelight is dangerous. I’ll ask for areas of the stage, which see heavy fighting, to be reinforced. The safety of the actors is crucial, everything from the type of floor to the consistency of stage blood is thought about (in case the actors slip). If a piece of furniture is going to be slammed into, then you reinforce that particular bit of the set, so no one is hurt.