Mitosis is the dividing of a cell, resulting in a daughter cell identical to the parent. He’s saying that his songs are like his “daughter cells” in that they are attempting to embody the some of the same thoughts that he deals with.
“Mind synched with psychosis” meaning his mind is shifted from his reality. But it’s his own fault, because he didn’t make the “Wise choices” (he put himself in the position he is in)