Keep focusing on the Premier League as the main target and downplay other competitions.? Obviously that is not a solution for a team like Arsenal which already has a mature squad. The goal of every team taking part in the competition is to win the title, Arsenal also really wants to achieve success in the Champions League. Arsenal just need to appear consistently in the Premier League, this season they are able to provide fierce competition to Manchester City which means the title race must be completed until the last match. Arsenal has quality, the depth of their squad cannot be underestimated by any team. They could surprise with the young squad that Arteta has, if they can concentrate more on each match, maybe Arsenal will be among the top teams in every competition they play.
I feel like that wouldn't be really a terrible idea, I am not saying that we are going to end up with a great result or anything like that, I am just saying that if they rest their players at FA cup and other English/British cups, and even the champions league, just ignore those and rest as many player as possible, then they would have a chance to make it work some other way at premier league.
This would allow them to have something that will get a lot different and we should consider that as something that will be calm and better in the end. I believe that we should consider how to get better in the end at premier league because what Arsenal really needs is to win that one, if they can do that then they could do whatever else.