Adding into this is tracking of time for the moving of the familiar / manifest mind. If a DM never tracks time for scouting then some of the tension is lost. Look at the dungeon movement rates for the 10 minute dungeon turn (I used combat movement x4 for standard 10 minute turn. This is standardize against based on some older rule sets but the DMG has a similar formula).

So by tracking this spell durations will expire, enemies will move throughout the dungeon or wandering monsters will happen. Without tracking time a lot of important decisions are missed.