Plan

Since I don't feel like mugging and feel that mugging is useless as it involves remembering all the facts, I had a plan.

History Exam - Remember some of the facts, do the essays first.
Geography Exam - Do all MCQ and the Source based questions, neglect the structured essays.
Math Exam - Exempted
English Exam - Just improvise...
Chinese Exam - (This one relies on luck, always lucky though)
Lit Exam - Remember PEEP Structure and improvise
LSS - Do Chem and Phy first. Bio will be done if there's time.

So like this, there is an estimated guarantee of at least B4 for each subject. Although this method is not proven to be good, it's the only thing to do now, since I slacked the whole year. Oh well, wish you good luck for your exams.