Look, dudes injure themselves in Basic. We have member who graduated and them medicaled out at his first duty station as a result of gutting it through his injury from Basic. It happens. My soft skill AIT? The class ahead of us lost a guy from PT when he stepped in a depression and hyperextended his knee. Jump school? I can remember a broken femur and broken coccyx from my class.
Nothing's guaranteed and frankly, asking for advice on how to make it through a SELECTION course amounts to getting a leg up on everyone. It is a selection course designed to test how you react to certain things. If the Regiment wanted you or anyone else to game the system, it would publish a guide. We DO NOT allow someone to G2 a course through this site. No if's, and's, or but's.
Frankly, guys in your situation who are worried over passing a course...the odds aren't in their favor. They are looking for an out before the first day, mentally they haven't "committed" to what lies ahead.
Show up in good shape, show up with heart, and learn the Ranger Creed. I've seen that advice about 3-400 times on this board.
If a vetted SOF (Green tag) member wants to chime in, y'all feel free. The rest of us will now take a step back.