I also liked the one between Giamatti and his wife confronting each other in their house and Axe and Wendy's confrontation. Lots of drama for the season conclusion. Tearing up the office on the false rumor was delicious.
Perhaps my favorite scene from the whole season was when Axe presented his offer to the family for the naming rites of that museum. The number was 16 for $16 dollars per round of golf as a caddie carrying clubs for the family patriarch as a kid trying to earn a buck. And then rescinding the full offer. He knew they would have to take it. Ruthless and Priceless.