I primarily work with people who are targeting scores above 700 and consistently underperform their practice test performance on the actual tests.
There's a single consistent factor that is the core of the gap in performance: in-test process. I'm referring consistent methodologies that cut across quant and verbal questions. Those core steps in quant and verbal are the antidote to the things that hit you hardest in the real test: anxiety and timing issues.
At this stage, simply going back to practice problems and practice tests isn't going to yield the results you want. You need augment that with a real focus on creating consistent processes for quant and verbal problems. The starting point isn't your ESR because it only answers the what question (what topic areas, question types and parts of the test are you making the most mistakes in). The real question is WHY are you making those mistakes. And your ESR can't answer that.
The key steps here are observation of process gaps during a practice test (ideally by a performance coach or, otherwise, on your own). The usual breakdown areas are as follows:
In quant: 1) failing to capture all the information in the prompt and fully preprocess it to get maximum visibility on the problem 2) weak or absent visualization (so you're working in the words designed to confuse you instead of in a more structure and empowering framework like a table, number line or Venn diagram for example 3) unstructured setup of the calculation equation -- the one you're running to get the final result in a PS problem and 4) inefficient or shoddy calculation processes that result in errors.
In verbal: 1) in SC, elimination answers by skimming for change points 2) in CR, failing to narrowly capture the core argument before tackling the question itself and 3) in RC, reading with too wide a focus rather than lasering in on core questions first.
These are key failure points that that I run across everytime I assess a new client. Once you've identified your gaps in process, you can do drills that exclusively focus on them. The results come fast and are significant for most people. And the process is really energizing -- because it breaks you free of the usual cycle of practice problems and solution reviews. It's empowering to get gains that cut across a dozen quant or verbal questions in one swipe!
Happy to discuss how you should go about this in a more personalized and specific way if you'd like.