Open-ended experimentation. This approach is similar to closed-ended experimentation except that more variations will be added for testing and experimentation will not stop when a winner is found. This method is used by large corporation to dynamically improve their conversion rates and improve user experience. Landing page can also be adjusted dynamically as the experiment results change to further enhance user experience.
Because the pages are part of your overall site architecture, you can use robust site testing tools like Optimizely or VWO to really improve your page/site performance. Unfortunately, while most landing page tools have built-in A/B testing features, they typically lack the options and level of detail available from more dedicated site testing tools.
Now your marketing automation funnel is giving you a boost at every stage: It responded within five minutes of their first contact, and that helped get you the chance to make your pitch. Now, after the pitch, you're ready to stay in contact and respond to objections in a friendly, targeted way. (And if they love the pitch, automation can help you stay in close touch until closing.)