The short answer
Same package, same order, every single quarter, in a trailing nine quarter format so trends and seasonality are visible without anyone doing mental arithmetic. Lead with the ARR bridge (starting ARR, new, expansion, contraction, churn, ending ARR) because that one slide answers most of what a board wants. Then unit economics: CAC payback, net revenue retention, gross margin, ideally split by segment. Then the P&L and cash view with Rule of 40 score and runway. Dave Kellogg's version of this is the template most SaaS boards have converged on. Two rules: never change a definition without flagging it, and open with the bad news, because a board that hears the ugly item from you trusts every other number on the page.