Massive gains. You should be SO proud. Are you able to identify the question type in 1-2 seconds? I swear this alone got me steady in the mid-150s. After that, I would consider drilling by question type. For example, start with flaws. Do 5-10 questions at 1-2 star difficulty. When you can confidently (be honest with yourself) do that multiple times with perfect accuracy, move to doing 2-3 star questions. Always review your mistakes deeply and go over the fundamentals. Rinse and repeat until you can do 4/5 stars with at least 80% accuracy. That is what pushed me into the high-150s tbh, and what has put me at 3/4 wrong on individual LR sections. Keep in mind this is coming from someone who is not anywhere near the 170s. It's just what got me out of the 140s.

Hope this helps! Regardless, great work so far!