Frtom various records I have it shows the first Fassett was John who came from Scotland and was made a freeman in 1654. He is probably the father of Patrick. One reference, "The Fassett Family" by Schuster starts with Patrick (this is the one you show as Benjamin F) and his wife Sarah, who had 10 children. Your Benjamin was the youngest, marrying Elizabeth Park. He was born 7 July 1690.
My records don't follow Benjamin down at all, except his marriage.
Good Luck,
John