I might sound stupid here but I find the whole squad strength thing a bit of a myth. The most successful sides seem to stick with the same players pretty much week in, week out. Having a tight unit is the most important thing.
Chelsea have hardly changed their mind up at all this season. City rarely do either. Barca play the same team pretty much every week. When Leicester won the league they did so by playing the same players all the time.
You’re right that we need to be lucky with injuries but no Europe definitely helps.
Our 1st 11 is now up there with the best. I’m pretty happy with our back up in defence and wide players. We only seem to be one central midfielder (uograde on Davies) and possibly another striker (upgrade on Tosun) from what we need.