Perhaps you could get the best of both worlds by making both a complete script and a minimalist set of landmarks, and only using the latter unless you get badly lost. Then you know that the worst case is that you have to pause for a moment, find your place in the complete script, and switch to that. In practice you will just use the minimalist landmarks, but having the script available may reduce the stress level.
(I haven’t tried this. On occasions when I’ve had to speak in public I have generally prepared a complete script and then felt free to ignore it.)
Perhaps you could get the best of both worlds by making both a complete script and a minimalist set of landmarks, and only using the latter unless you get badly lost. Then you know that the worst case is that you have to pause for a moment, find your place in the complete script, and switch to that. In practice you will just use the minimalist landmarks, but having the script available may reduce the stress level.
(I haven’t tried this. On occasions when I’ve had to speak in public I have generally prepared a complete script and then felt free to ignore it.)