Preferring the Premier League doesn't mean Arsenal have to forget the Europa League, because as long as Arsenal are able to get good results for both of them this season, it won't be wrong to do so even though it won't be so easy for Arsenal. But I see that there are better developments in the Arsenal team this season so that Arsenal will definitely be able to fight for those two very good trophies (the Premier League trophy and the Europa League trophy).
Can Arsenal kill two bird's with a stone
Maybe they can but not with the premier league and Europa league
They need to put in more work so they can at least win the league
Anything can happen if Arsenal are able to maintain their quality, after successfully shaping their squad to be better than in previous years, Arsenal are ready to compete to kill the birds in front of them. Arteta's role was very influential on Arsenal's appearance, he as a strategist in the Arsenal squad could not be careless in his throws, birds had to be dropped one after another to reach targets that they had not gotten for a long time.