In games Napa played over 40 minutes in last year, he averaged 28.
In 19 games, he only had 3 games where he scored over 36 points
2017 was a bit better
2016 he averaged 45 as a starting prop, averaging 56 minutes
Obviously you'll be hoping he can get back to 2016 levels. He's cheap enough that its not the worst gamble you could make, but gee he doesn't inspire confidence in me,