However, I agree with you that Arsenal really need a striker and winger. For the striker, Arsenal wants to sign Sporting striker, Viktor Gyokeres. but indeed, the challenge is they have to compete with Man United, where Amorim is.
Yes, of course it won't be that easy. And moreover there is no clarity regarding the Viviktor gyökeres transfer rumor. It was reported that he was not interested in joining Man United. Although there has been some information regarding his release, it might be at a rate of €70M and €75M. However, there is no clarity yet about where he will go later.
Other alternatives that are being rumored with Arsenal are the following players.
https://www.transfermarkt.com/arsenal-fc/geruechte/verein/11If Arsenal can succeed to sign a prolific striker like Viktor Gyokeres, I think they've succeeded in solving 90% of their attacking problems. They need a striker whose presence will always be felt by opposing defenders and that I don't think they currently have. I watched their FA Cup game against Manchester United on Sunday afternoon and if I be honest, I don't think Arsenal can win any major trophy without a deadly striker.