LT has always been either the most powerful, or the second most powerful entity. (officially)
"Protege/Scathan" are just that, anomalies. It's also over 1000 years from now so it's inconsequential.
LT didn't act directly against Korvak. He should've used his universe manipulating powers,
instead of a single puny sun to attack a being who had absorbed Celestials and Cosmics. 😂
LT proved his at-least absolute universal control when he sealed the whole freakin universe separating it from the Multiverse.
(while Korvac conceded he was not above the universe entire and he needed the UN to affect it)
... damn ... that's PIS/CIS and Plot in one.
Nebulos? Nebulos was a mystery before he appeared in that one arc.
Nebulos had a plot-device in hand, his Staff, that could absorb any attack, including the LT's.
Remember, Protege, able to copy and stack any power he witnesses, including the LT's,
and Scathan was clearly above them both.
No biggi, just anomalies. (Also, Nebulos is irrelevant minus the Staff)
Staff = plot
** The LPS comedy I don't even register as ever having happened. (real dumb shit)