Same eleven vs squad rotation: what's your choice?

[t11_fan]

I usually rotate some players in my squad, while I keep in 1st team the most important players for both matches in day.
For me, it is rather question of amount of packs; if I have a lot of green and red boosters, then I spend them on 1st team players to keep them playing as much as possible. However, when number of boosters is low, then I save them for the most important players while I rotate the rest of the squad.