Do not assume either perfect completion or perfect accuracy is universally optimal because assessment scoring varies.

The safer preparation goal is to manage time so you can make high-quality attempts across the assessment without spending disproportionate time on one item.

Use practice to set decision points: if a question is consuming too much time, make the best justified choice you can and move on when the format allows it.

Follow the instructions for the specific assessment and avoid relying on unverified assumptions about hidden scoring rules.

This is why I stopped tracking only completion rate in practice. Accuracy by question type was more useful.