That is a lie because people who actually test in dev server told me that it wasn't working
I tested it myself and those people you're talking about have no idea what they're talking about.
When the bug was getting fixed i was the one doing several tests on each restart not them and i noticed a difference in damage.
I did a test just now, this is the damage with crane presentation mastery level 1:
The damage with crane presentation mastery level 6:
The damage has been done on the same mob, same weapon the only thing i changed was the passive however i noticed that "Increased persisted damage" passive is not being added to skill damage (I will report it)
Most of classes have no way for resist burn rip them.
If you're a shadow knight try full burn defense set.