I suggested this to somebody in another thread somewhere, so disregard this if you've already heard it and decided not to pursue it! One suggestion I might have if you're in the sub-10 area and timing is the major barrier to accuracy is to ignore the last passage (or one with only 5 or 6 questions). I know it sounds crazy, but hear me out. According to most scales you can miss 10 questions and still get a 10, which means you need to figure out a way to get 30 answers correct.
If you guess randomly on a 6-question passage, chances are you will get one point from that (obviously, pick one letter for the whole passage). So in the remaining 6 passages, you would need to get 29 answers correct out of 34. This allows you to miss one question on most passages, consistent with your un-timed average, and it opens up a lot of new time for you.
In this case, you'd have ten minutes per passage, which is significant.
I'm not sure how to advise you to split up those ten minutes. Personally, I spend a lot of time reading, and reading slowly, and then I can go through the questions pretty quickly because I've really internalized the passage and know exactly where to find tidbits I do need to refer back to. I know others do try to keep an eye on the clock when reading, hurry the passage, and have success with that method. It wouldn't work for me.
You know yourself the best, so I can't say what intra-passage "microstrategies" will work for you, but perhaps the "macrostrategy" of skipping a passage would help. Just a thought! Maybe it's worth trying a verbal section or two and seeing how it shakes out? Good luck!
Oh, one recommendation I would have if you do try this out is to not waste time flipping through the passages to figure out which one to skip. Just plunge right in, and when you get to a passage with only 6 questions, just have that be the one you skip, mark all As, and move on to the next one.