KMST 1.2.467 - Cygnus Revamp

I'm curious as to what it means by "but will have lower effects after the second skill."
Does that mean that after the 2nd level 120+ Cygnus Knight, the effect will start suffering from "Diminishing Returns"?

I'm probably reading too much into it.

That's what I'm interpreting it as, but it could also be that they're just counted as being level 1, or something.

Does this mean that they can ignore elemental strong status from bosses?. If it ignores the physical and element strong status, they are going to be quite strong for empress or future bosses.

Edit: Also didn't no one notice that there isn't a yellow line in this skill representing Dawn warrior's light?

I would assume it only applies to Elemental damage, not physical damage. I believe Thunder Breaker's Element: Lightning makes its attacks Lightning, since none of the skills are actually tagged with an elemental type except Element itself.