i have kind of viewed their attacking players at these positions:
Lukaku - 9
Werner - 9
Havertz - 10, 11, 7, 9
Mount - 10, 7, 11
Pulisic - 11, 7
Hudson-Odoi - 7
Ziyech - 7, 10
Havertz is playing 9 in the most recent two matches due to injury. I think Mount is best suited for 10, but wants to play on the wing more, and has had to lately due to injuries. I think Pulisic has played on the left wing at 11 more than anyone else on the squad, so when/if fit, he should be able to prove himself and have a chance to slide back into their best 11 and start more games soon. ..but their best 11 at this point, when all are healthy, probably includes Havertz, Mount, and Lukaku when they employ a 3-4-2-1 (they'll have two 6's in central mf and wing-backs out wide - no true #10).. and if they do a 4-3-3, then Mount or Havertz can slide to 10 and CP10 starts on wing.