Maybe 1.
Wentz has never been a huge INT guy. His career INT % is 1.9. For reference Tom Brady is 1.8, Dak 1.7, and Jameis Winson 3.3.
Diggs had a tale of two seasons. 7INTs through the first 6 games, and 4 INTs through the last 10. Even with that 4INTs in 10 games that is still a really good pace that should put him in that 6-8INTs per year category. If hes really a 6-8INT guy and this year was the outlier at 11, its probably unrealistic to expect 2-4 of his INTs this year to come from 1 QB....especially one that really doesnt turn the ball over a very high rate.