Behind Alexandria Ocasio-Cortez’s Masterful Interrogation Of Michael Cohen, page-29

Discussion of who asked what were largely pre-scripted questions is irrelevant. 

Cohen's history is also irrelevant to anyone with any knowledge of legal process.

What is relevant (legally) is an ability (or otherwise) to corroborate what Cohen said in testimony.  How about the cheques signed by Donald himself for starters.

Another key  point  is that in the search for corroboration, the Committee can now subpoena additional witnesses.  We all know that and we all know that discussion of AOC's economic knowledge is completely irrelevant  ( unless  you are a Trumpist with an IQ similar to those friendly orange apes that do an excellent job washing your clothes on request. )

State of New York prosecutors can and will apply the corroboration of Cohens testimony in the other direction to help cement their own findings,

Everyone other than welded-on Trumpists is waiting to hear Donald Jr refuse to answer questions on the grounds that it may incriminate him.  Weisselberg's testimony will be even more interesting if financial documents are submitted as evidence before him during his testimony.

Mueller is the least of Trump's worries.  

cheers