I think it is not realistic to expect much punishment. Of course russiagate is worse than Watergate, but nevertheless Watergate serves as an example of punishments.
https://en.wikipedia.org/wiki/Watergate_Seven
AG Mitchell served 19 months for example.
AG Mitchell didn't commit treason. He didn't try to overturn a duly elected POTUS. He didn't get the heads of the intelligence agencies to create black-ops, without the full cooperation of the sitting POTUS.
Loretta Lynch should swing for her crimes....unless she {{{cough, cough, cough}}} gives enough evidence to implicate the White House and/or the State Department.
"Somebody'd better fix this shit pronto...or we're all gonna hang!" ------- Hillary Clinton, November 8th, 2016 10pm EST.