Gotta go with 4-2-3-1 again, full pressure on Barca from minute 1. I want at least 30 minutes of nothing but running and hustle, and then the last 15 minutes can be breaking up play, drawing fouls, and making life as difficult to Barca while retreating a bit. In a perfect scenario we score on a surprise counter and force Barca to switch up more attackers in a desperate attempt to score. That's a recipe for disaster when we have Dybala, Cuadrado, Pjanic, Alex Sandro and Alves getting ready to feed Higgy who has been one hungry hippo lately. If we go in with the intention to defend, we lose by many many goals. If we go with the intent of scoring, we might lose, but definitely not by a 3 goal margin. PSG went in with the intention to defend, and were their own worst enemy by doing so.
Nightmare scenario is they score withing 5 minutes, gain confidence, and start pouring while Bonucci and Chiellini perform erratic fouls in the box on diving Suarez and Neymar and Higgy chokes on our one lonesome chance.