GMAT Focus: Data Insights - Heavy fluctuation

Hello everyone.

Data Insights in Focus edition seems to be a different beast from Quant or Verbal. It looks to me that it needs a fine tuning of the time-accuracy trade-off to a high degree.

I have seen scores fluctuate heavily when this trade-off is not worked on properly.

Too fast - accuracy drops heavily.
Too slow - the final few questions suffer.

Mock 1 (April 4, 2024) - 615 (Q84, V79, DI78) -- [Order Q-V-DI] {Diagnostic Mock}
Mock 2 (June 6, 2024) - 595 (Q85, V75, DI78) -- [Order Q-V-DI]
Mock 2 - Retake (June 30, 2024) - 715 (V82, Q90, DI84) -- [Order V-Q-DI]
Mock 3 (June 18, 2024) - 705 (V84, Q90, DI81) -- [Order V-Q-DI]
Mock 4 (June 23, 2024) - 655 (V84, Q85, DI79) -- [Order V-Q-DI]
Mock 5 (June 26, 2024) - 705 (V83, Q87, DI85) -- [Order V-Q-DI]
Mock 6 (June 29, 2024) - 675 (V83, Q88, DI79) -- [Order V-Q-DI]

Original GMAT at test center (July 31, 2024) - 685 (V82, Q88, DI82) -- [Order V-Q-DI]

I have done most of my preparation from e-GMAT online question bank for Data Insights, and towards the latter end of preparation solved from original guide; all of them timed practices.

I make a time matrix before the begin the sections as below. Where 'T' is the time that must be shown on timer when I just land on the question 'Q'.

Q ---- T
4 ---- 39
8 ---- 30
12 ---- 21
16 ---- 12

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Any advice on how to achieve full potential in Data Insights? My quant is good, and most times Math based problems are absolutely fine unless there is extreme time pressure (like less than 2min for the question).