I'd still persevere with Buendia ahead of Barkley, for the extra pressing and energy. And if they are going to sit back, I'd feel more confident about Buendia popping one in from 25 yards than I would Barkley.
Save Barkley for the last half an hour when an extra body a bit further back would be useful and in case DL or Onana need replacing.
Otherwise Ads' team.