While there's a tiny, almost non-existent chance of exceptionally high scores on the multiple-choice section compensating for completely blank essays, this is highly improbable. The weighting of the essays makes it practically impossible to achieve a 4 or higher without at least attempting them.
Instead of skipping, even if you're running out of time or feel unprepared, you should:
* Write something: Even a brief, underdeveloped response showing some understanding of the prompt is better than a blank page. You can earn partial credit for demonstrating some comprehension and attempting to construct an argument, however rudimentary.
* Plan your time: Better time management during the exam is crucial. Allocate appropriate time for each essay to ensure you can at least address all parts of the prompt.
* Practice writing essays: Thorough preparation is key. Practice different essay types and familiarize yourself with common prompts to build your confidence and speed.
In short, focusing on essay preparation and attempting the essays, even if imperfectly, is the only realistic way to aim for a 4 on the AP English exam.