For strengthen and weaken questions the best advice I have is first think of them as a flaw question-what is the gap between the support and the conclusion? Why does the support not 100% prove the conclusion? Then use that flaw and either exploit it (weaken questions) or try to close the gap (strengthen questions). Once you start seeing that the answers have to relate to both the support and conclusion rather than just the conclusion it will be easier to eliminate those answers that look like they would strengthen but strengthen the conclusion rather than the REASONING that leads to the conclusion.

^^doubling down on the taking a break advice. I think the most discouraging thing you can do is keep drilling without changing anything and not seeing an improvement. I had a point drop a couple of weeks ago during burn out and every section I took kept reinforcing it. It truly sucks. The best thing I did was take a day off. Come back. And instead of doing drills review content. Then take a full section and see how it goes.