Stanron:
Me 3 2. I've started using AUDIO as the first word as it has four of the five vowels innit? Anyone got other five letter words with four vowels?
ADIEU: Again 4 vowels, but includes 'E' which comes top of the list for most deciphering options.
QUEUE, also 4 vowels but less help due to repetition.

I still tend to start with TRAIN followed by DEMOB (unless TRAIN gives me a lot of info)