A basic guideline for anchor building: narrow angles are good, wide angles are bad. While that’s generally true, it turns out in some cases, a very narrow angle is not so good for load sharing. Check out a recent article and video by Over the Edge Rescue on this. (Warning: anchor nerds only.)
Premium Article available

Is a small anchor angle better? Maybe not — Alpinesavvy
A basic guideline for anchor building: narrow angles are good, wide angles are bad. While that’s generally true, it turns out in some cases, a very narrow angle is not so good for load sharing. Check out a recent article and video by Over the Edge Rescue on this. (Warning: anchor nerds only.)
Alpinesavvy (www.alpinesavvy.com)