Politics is not very important. Even if you want to study PPE, doing history and econ is much much more recommended. Also, you will have a harder time applying for PPE without Maths. Even if you do IR and politics, politics A level is not required. So cross it out.
Econ is a good one to have, no matter what degree you do. Unless you do Classics, choose one between EngLit and Classics (EngLit is better I think)
Spanish will greatly improve your employability even if you don't do Modern Language at uni
So I think the best choice is
Econ + EngLit + Spanish (+ Politics AS level)
or
Econ + EngLit + Politics if you really like politics. Though history will be much better.
Do Maths or AS Accounting if you want to steer more towards an Econ degree. (ie Econ Maths EngLit)