I'm currently a second year at Bath studying Economics.
Your subjects are fine, I know plenty of people who didn't studying Economics at A-Level and went on to do it at Bath.
You have also managed to attain solid grades already, and predicted with three A*s, so I'm predicting that you are pretty much guaranteed an offer from Bath at the normal A*AA.
Just in comparison to you, I had 6A*s GCSE and AAAA in AS (Maths, F.Maths, Eco & Physics), but fell short in my A2 with AABB, but still managed to get in.
Good Luck anyways!