Id be sticking gvardiol in midfield with kovacic and then bernardo coming in to help from the right wing, foden and alvarez as the main two behind haaland foden drifting in from the left, interchanging with alvarez. I'd also be throwing on doku early second half to rinse zinchenko if we aren't comfortably infront. I don't think that's likely to happen though.
We will probably see something like Ederson
Walker
Dias
Akanji
Ake
Bernardo
Kovacic
Foden
Alvarez
Grealish
Haaland
With Bernardo playing as the rodri role and kovacic in support.
I'm not fearful of arsenal but they'll be going into this at practically full strength despite Arteta's "deception for dummies" quotes and we will be severely weakened and not playing particularly well either so avoiding a defeat here would be monumental. They know this is a must win for them so I'm not expecting too much in truth.