If he goes this route, he must take the stand to make his case. He can’t use proxies who make claims about him, because to claim it was the lawyer’s fault, he can’t use hearsay testimony.
That’ll open him up to cross examination by the feds on the stand and under oath. Can anyone who isn’t a MAGAt cultist think that would go well? He’ll be crushed and end up exposing just how weak and mentally limited he is. Add in the threat of purgury and it would make for an epic collapse.