Should I Grab Diplomacy?

So, we are just about to head to the Femdrell for some more Diplomacy hobnobbing. Of course, in the Femdrell is the object of Davin's affection, Princess Rhiannon...and her Dad. So, the question is, should Davin swap out Hunter's Advantage (a small, very circumstantial damage boost) for Skill Training: Diplomacy? I kind of feel that the next bit of roleplaying is gonna be very important to Davin's development (for good or ill), and I know I'm gonna be bouncing some important Diplomacy rolls.

What do you guys think?

-Swift