The page you referenced does have the correct order of events listed there. If you want to see which events were fired for a particular request you can install debug-bar and debug-bar-action-hooks.
If you are wanting to send a header either plugins_loaded or init will work. But it is recommended to use the send_headers action that is fired just after the request is parsed, also if your rules depend on data in WP_Query you will need to use send_headers.
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