A tale “so crazy you’d be amazed to see it on 'Billions.' ": Carl Icahn typically works alone. The dark prince of corporate raiders shuns the usual clutch of outside attorneys, investment bankers, and PR firms that rival activists assemble for their assaults. Instead, Icahn relies on an in-house team of fewer than a dozen financial analysts and lawyers, a brain trust that toils alongside their controversial, 82-year-old boss on the 47th floor of Manhattan’s General Motors Building. But that’s just his support staff. As for partners, well, what’s the point? Icahn, whose Icahn Enterprises ranks No.