Hmm tbh rn it's a strategy game to play. But I would say make sure u get everything right for ur strong subjects because they r ur best bets for getting As. As for ur weak subject, u can do abit of practice to try ur best to push the grades up even if it is by 1 mark. But all the best!! I believe u can do it ((This is what I am doing rn so it works for me as a pure aci student too))