With 8 days left at 655, your Quant score is already solid — 2-3 errors typically means you're not making conceptual mistakes, you're making execution errors under pressure. And 6-7 DI errors tells me pacing is the real culprit there, not comprehension.
Here's what I'd prioritize given your specific situation:
For Quant: Stop grinding new questions. You've done TTP and OG — more practice material at this stage won't move the needle. Instead, pull up your
error log from your last 2-3 official mocks and categorize those 2-3 wrong answers. In my experience, at your level, Quant errors cluster around 1-2 specific problem types (often Overlapping Sets with three variables, or DS questions involving inequalities and absolute values). Once you identify the pattern, do 15-20 focused problems from that one type only. Precision beats volume this close to test day.
For DI: 6-7 errors almost always comes down to one thing — spending too long on Multi-Source Reasoning or Table Analysis and rushing the Two-Part Analysis questions at the end. In your next practice session, deliberately set a hard 2.5-minute cap on each MSR question. If you're not confident, mark it and move on. DI pacing is a skill you can sharpen in 2-3 focused sessions; buying 10 new mocks won't help as much as fixing your pacing discipline on the ones you've already done.
Skip buying the
Expert Global mocks. At 8 days out, reviewing 4-5 questions in depth from mocks you've already taken will serve you better than 10 new attempts.
You've clearly put in the work — trust it and get specific in these final days. Go get that score!