First, realize you don't need to break the web to complete the epic quest, just destroy the relic.
Second, if the various write ups don't help, it's doubtful more will.
But in case a different perspective helps, simply turn the mirrors to shine light to their neighbors. Turn those neighbors to shine light to the center. One set will take more bounces than that. It's not a puzzle, as you can do it in any direction. Just once you commit to a direction, process of elimination means the remaining mirrors then only go toward the available way, which makes it easy as you don't have to pick, just point at available one.
Realize MOBs will have obscured the former ones you did, so go back and clear them out. Voilà.
"Sometimes survival comes down to not being hit. Actually, most times." -the chicken skill, Bob and Weave
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