I see some early stage funds have an advisory network like MBX Capital. They have advisor agreements from what I remembered but what if a fund manager wants more than a couple of advisors (some of them temporary) or venture partners?
Better not to have too many advisors or venture partners as that will make cap table and legal agreements very complicated. Venture partners should get carry on a fund basis and not on a deal by deal basis. Reference venture share agreement for a variety of suggestions on carry for venture partners.