Complex sentence: According to amoralism, there is nothing wrong with egoism, but there is also nothing ethical about it; one can adopt rational egoism and drop morality as a superfluous attribute of the egoism.
Split into simpler sentences: According to amoralism, there is nothing wrong with egoism, but there is nothing ethical about it. One can simply adopt rational egoism and completely drop morality as a superfluous attribute of the egoism.