I think, this is the third time or second time Arsenal is ended up in second position in the premier League table in the tenure of their current coach, which is a big challenge for Arsenal coach right now to take a good step to sign a good player that will handle the centre forward to make the team stronger. Gyokeres will be fit for such wing, if Arsenal coach can consider the player to join the team this season because his team is ready to release him to Arsenal if they are ready to pay the amount of funds they are willing to sell him out to Arsenal, I hope Arsenal coach make a good decision in this summer to sign in players that will make team to win this premier League title.
I think that if Arsenal do a good job this season by Being more consistent in winning then they could take the PL, if not you have to ask City how they did in the 2nd and 3rd seasons, where Arsenal were not consistent and they lost a lot, Liverpool already have it clear, they know that with a good advantage they will take the PL, I couldn't say which team could do better, but if Arsenal with the material they have they can make the difference.