I can understand those saying Champions League, but I don't think it's possible to really prioritise it.
Pep uses squad players in the group stages because they're so easy. There's a good chance we'll get a reasonable last 16 draw too.
After that it's going to be our strongest team, and we've tended to go weak in the FA Cup semi if needed already.
We could rest a player or two in the league match before a quarter or semi, but then we did that at Luton and still went out to Real Madrid, despite being rested AND the much better team on the night. What if we'd had Arsenal or Liverpool and rested players, and still gone out?
Just not sure there's much more we could do for the Champions League.