Words with 'dev' at the start and 'x' at the end

What is the max number of words you could assemble using this list?
Sadly, there is only 1 word possible for any word that starts with 'dev' and ends with 'x'.

In Scrabble, what's the highest number of points possible from this list of words that start with 'dev' and end with 'x'?
As there is only a single word possible, you can only play 'devex' for a total score of 16 points.