I am a Canadian applying to LSE, but I finished high school last year and am a first-year uni student.
I am not sure what you are applying for, but would it be a good idea to take AP Microeconomics and AP Macroeconomics as well? Since many LSE programmes, and not just those involving economics, require introductory economics? Just like you, I took AP Calc (AB though), these two econ courses, and some other APs.
But 90+s should suffice.