After all, Thomas Partey also only has one season left on his contract at Arsenal and thus, selling him in this transfer window would certainly be a good decision. After all, although Thomas Partey was quite good last season, but the fact is that there was a decline in the performance and results that Thomas Partey had last season, so if there is a team interested in buying him then surely Arsenal will immediately agree to it. But about Arsenal's goal machine, I personally expect the issue of Arsenal's interest in Osimhen to become a reality. Although indeed, the price tag is very expensive, so there will be many considerations for buying Osimhen, but basically Arsenal will be better off if Arsenal succeed in bringing in Osimhen.
The decision to release Thomas Partey seems to be still being considered by Arsenal, even though several rumors have linked him with a Saudi club. Apart from his role still being needed, at least Arsenal must first find an ideal replacement. after that, maybe Thomas Partey will be released in this transfer window. However, if Arsenal still keep him, ideally they will tie him down by extending his contract at least to protect his transfer value later. Moreover, keeping Partey for another season does not prevent Arsenal from bringing in a reliable midfielder, apart from that, Partey is still needed by Arsenal with his stability. But I wouldn't be surprised if Partey ends up leaving, because he's been in the news a lot since the previous season.
For the pure striker that Arteta is currently targeting, it seems that bringing in Osimhen will be very difficult in the transfer value negotiation stage. In fact, several other clubs are also always linked with this Nigerian international player. Like you, to be honest, I also hope that Victor Osimhen can join the Emirates in the transfer market this summer. Thus, the Gunners have a player who can be relied on as a goal scorer in their quad. However, Napoli are reluctant to let Osimhen go for the transfer value Arsenal has proposed. As a result, currently the issue is that Arteta is looking for other options and currently the Sporting Lisbon striker is currently being discussed with Arsenal. Let's wait and see which striker Arteta will bring to the Emirates in the transfer window this summer.