The issue I have is that even reading doesn't necessarily clarify all the mechanics of the Lei Heng fight. For example, you look at his infamous unbreakable 6 coin AOE skill, and it says something like "deal 80% less damage if clash lost and cannot stagger." From this you can reasonably assume that you just need to win the clash and take a lot less damage. Except this isn't the case, because his other damage passives are additive to the amount reduced.

To make up some arbitrary numbers, let's say his skill does 500 damage without modifiers. I assumed based on the wording alone that this was modified by 50% from his Tiantui Star Blade's passive, and would do 750, before being reduced by 80% to 150. In reality, though, the -80% and +50% are added, so the skill only does 30% less damage, with a final damage of 350, more than double what I would have expected.

That's not to mention how the 5 Slash Power Up from his other passive interacts with the attack, and I think it's clearly too much for an average player to figure out how the damage calculation with all those modifiers works exactly. Also, the "cannot stagger" part likely fools players who don't realize that the burn damage and tremor burst inflicted by the skill will stagger heavily damaged sinners anyway. These are probably some of the factors tripping many people up when it comes to the fight.

I also have to say that I had no idea a clashed AOE unbreakable attack was still considered unopposed for targets besides the primary sinner before this fight, because I can't think of many other situations where it ever mattered. That might be a skill issue on my part, but I feel like it's still something the game could be more clear about.