I don't understand why we are desperately pursuing Arthur. Arthur and Tonali alone won't resolve our midfield issues - they're both a combination of young, inconsistent and unreliable talents. They're both raw at this point in time.
We really should be going for 1 talent and 1 WC player. Essentially, Pogba or SMS + Tonali should be the requirement. There's no minimum or maximum requirement in this scenario. Either get those players that can elevate the level of your team or don't bother at all.
We should be entertaining offers for every single one of our midfield players (except Bentancur), Costa, Pjaca, Burnturdeski, Rugani and De Shittlio. Actively try and sell these players or use them in exchange deals. Honestly, half of our squad should be/could be sold, and we would only be losing numbers, nothing in terms of quality.