When contemplating the intriguing world of parlay betting, one may wonder: which sports and leagues should be included to maximize potential returns while maintaining a manageable risk? Should one gravitate towards the time-honored traditions of major leagues like the NFL, NBA, or MLB, where the fanfare and competitive edge are ever palpable? Or perhaps, is there merit in delving into the more niche realms of esports or international soccer leagues, where the unpredictability might yield surprising dividends? Furthermore, how does one assess the synergies between different sports? Do basketball and football teams, for instance, offer complementary betting opportunities based on their strategies and player performances? Moreover, is it prudent to account for the varying game schedules, which could impact the timing and viability of bets placed? As the landscape of sports betting evolves, what innovative approaches can one adopt to identify the optimal mix of leagues that enhances the chances of striking it rich with a well-crafted parlay?