Honestly I believe that Arsenal can go far if they have an attacker, that's what's many of us believe, they will be complete on like last season when they operate without a striker especially when they had to deal with Kai Havertz out for a long time.
If they have a better Striker they would have even gone far and probably won a major trophy all this while. I don't know what's taking them to get a striker just like every other top teams, I know Havertz is not a bad player but to be at a top level Arsenal needs to understand that Havertz is not the solution else they will just keep being an ambitious team that wins nothing. Get Osimhen, Gyokeres or Sesko they will definitely be better.
Well, since several seasons ago, we actually all saw quite a lot of potential in Arsenal. Arsenal have basically found a good composition in their squad. It's just that what Arsenal lacks is their consistency throughout the season. And yes, in terms of second tier players, Arsenal really has to prepare the best, whose quality is not much different from the quality of the first team. This is necessary when a major player is injured.
You have a point, they need to have players that can come in and still give similar performance as the first team players in case of injuries, Arsenal clearly lacks that. But the most important thing is for them to get a Striker, if they can do that they can do that then they should be able to challenge for the title better.