My lineup for tonight would be; Bravo; Vidal, Pique, Umtiti, Digne; Rakitič (Gomes), Busquets (Samper), Denis; Messi, Suarez (Munir), Arda.
The ones in the brackets to be subbed in or start and later be subbed off for the first options. Although i do think Busquets should definitely start, just to be safe. Samper can get his 15-30 minutes when we're hopefully comfortably ahead, aggregate wise.
But i would consider actually starting Gomes, or at least sub him in right at the start of the 2nd half, same goes for Munir, let it be instead of Suarez or Arda.
Wishing that Vidal plays tonight, so that Roberto plays at the weekend in what is currently the more important match (since we have a nice 2 goal cushion here even before going into the match, even though the opponent is obviously better tonight). Also wishing for Umtiti, time to start perfecting the Pique-Umtiti partnership.
It'd be good for Mascherano to get some rest before Betis too, he's not a kid anymore, him and Iniesta need to start being dealt with more care.
In any case, with the nice lead from the 1st match already in place, a great chance for our latest additions to get their first real match under their belt, and hopefully lead to us to a comfortable evening of football, hopefully topping it off with the first official home win of the season.