I've thought mine out. Tough to pare down, but ...
My favorite splurge dining experiences are tasting menus so I will have three of them.
Friday night: Joel Robuchon tasting
Saturday night: Michael Mina tasting even though I have done this three or four times in the past
Sunday night: I might be tempted by Alize since I've never been up there. Picasso (which would be a repeat), Shibuya (repeat omakase menu), or toss in a steakhouse. Maybe Carnevino since it has always intrigued me.
Saturday: breakfast outside at Mon Ami Gabi. Saturday afternoon: Tea at Mandarin Oriental, but cheating by adding a nice bottle of champagne to the tea service. Sunday: Jasmine Brunch.
If schedule allows, a cocktail at the Eiffel Tower restaurant would be in order.
Others in consideration: B&B tasting (repeat), Prime, Charlie Palmer Steakhouse, Guy Savoy, Craftsteak.