I think we need to go all out for Sancho as the alternative is for him to end up at Manchester United, they are our closest rivals at this moment in time and the Sancho signing ultimately could be the difference between the 2 teams in the short term future. It is even more vital that we get one of the elite youngsters currently available in the market and Sancho seems like the most realistic acquisition for Chelsea, Werner is likely to end up at Liverpool, Martinez has his heart set on Barcelona & Haaland has recently moved to Dortmund.
Having the attacking options which include Zyech, Sancho, Tammy, Pulisic & Hudson Odoi would easily be top 3 in the PL