Here are the results:
War: A couple.
Gods abandon you: More times than you can count.
Suicidal thoughts: A few.
Hungry donkey: How did I miss this one?
Pharaoh complains too much: Does a whinging King of Gods count? I think so.
Boating accident: Bingo.
Giant Snake: How could I write a novel without mentioning Apep? Obviously, I couldn't.
Prophecy/Oracle/Angry Magician: Duh! This is practically the plot.
Assassination plot: At least two.
Seductive woman: Ever heard of the Kushite Queen Oso? Probably not, but you will.
Misplaced penis: Yes! This IS a novel about Isis and Osiris, although in our house we call this problem the "amazing, missing golden wang."
Uncle sexually assaults nephew: Next book!
Lettuce: The antagonist's favorite food.
Physical attack: It's a given, and at least one features the crocodile god, Sobek.