Will my grades be enough for Warwick Economics?

As harsh as this is, no. Warwick economics is A*AA and applicants (such as myself)/others applying to oxbridge will have met/exceeded their requirement with 3-4+ A levels. Shouldn’t stop you from applying though.

yeah i don't think you'll get an offer but it's not so out there that you can't waste 1 of your 5 choices, as long as your 4 others are realistic

Isn't it a waste to apply to a uni I wouldn't get an offer from?

I think people generally leave 1-2 choices which are considered 'reach' offers, say ones you really want to get which you have/very close to having in terms of grades (say A*AA in your case). Then 2 other choices for which your predicted grades are a match to their requirements (so AAA) and maybe 1 safety option out there for which you exceed the offer (say AAB)

I'd personally go for it as I can't see much harm in doing so?
Are you doing further math? Your EPQ might be a plus if its econ related and you can talk about it in your PS?

As harsh as this is, no. Warwick economics is A*AA and applicants (such as myself)/others applying to oxbridge will have met/exceeded their requirement with 3-4+ A levels. Shouldn’t stop you from applying though.