If the tangelo is prominant, you may want to consider 20A as well. If the tangelo is subtle, I'd stick with 16e.
BTW, I made a Tangelo saison recently from about 4lbs of tangelos off a tree in my back yard that turned out great. I hope yours works out!
Primary #1 - Midnight Ryeder (Midnight Wheat and Rye)
Primary #2 - Florida Weiss
Primary #3 - Kane-DOH APA (Honey Citra APA)
Secondary #1 - Downtown Flanders Brown (brewed August 2012)
Keg #1 - Raspberry Florida Weiss
Keg #2 - Cinnamon Raisin Cider
Keg #3 - NONE!
Bottled - NONE!