Firstly they need to stay up and then establish themselve in the top six.
For that they won't need the best players but a talisman ( hope they do go for and sign Kane the twat) and then some decent talent that can help then initially in Jan, you have the likes of Isco, Coutinho, then you have Prem players out of contract in the summer clubs may cash in on Maitland-niles, Elmeny, Lacazatte, Rudiger, Christenssen, origi, all slightly better than what they have, plus they could easily aggressively go at clubs like leicester, west ham, spurs for their players.
First up is to stay up, then they should expect at least 3 seasons to be established as a top 4 contender with possible cup wins and then a title tilt.