Harmeet, I've helped build out several hypergrowth GTM teams at SaaS startups. A lot has changed over the past 5-10 years. What I have seen to be most successful is highly personalized/targeted outbound--via sales personnel and tooling--account for 55%-75% of pipeline and Marketing providing the rest. While somewhat industry/buyer dependent, there is definitely this pattern. Marketing has been more demand gen oriented in the past 5-10 years in my experience. That does dictate what channels you build out 1st, 2nd and so on.