RC Strategy - Any question types to consider "giving up"?

I wouldn't base this on the type of passage. Unless you're really behind on time, in which case skipping an entire passage could be a 'hail Mary' type of approach to get back on time. However, that would definitely have a strong negative impact on your score, so you're way better off employing a strategy that keeps you from getting so far behind in the first place. Getting behind on time isn't inevitable - it's within your control!

Instead, you're probably better off basing this on the type of question. For instance, I have students who choose to quickly guess on "which of the following EXCEPT" Reading Comp questions, with the reasoning that these problems take longer, since you need to be very thorough about eliminating each wrong answer.

You can also make some quick guesses proactively on RC questions if you get used to the most common features of wrong answers. For example, there's often a wrong answer choice that's wrong because it makes an "extreme" or "judgmental" claim, using words like "always," "worst," or "cannot." Answer choices that use those words aren't ALWAYS wrong, but they're less likely to be right, because you need extreme proof in order to pick an extreme answer. So, if you're behind on time, you can take a shortcut on some RC problems by quickly eliminating things that have extreme language in them, since they're less likely to be the right answer.