In which order RTC loads the components
One answer
"Load" should really be thought of as an atomic operation. Either everything specified gets loaded, or nothing gets loaded (so thinking in terms of "what gets loaded first? should not really apply - unless you have a different underlying question).
There is no way to 'customize' the component load order, but there is nothing stopping you from picking the components you want loaded first and doing that manually, then manually loading what you want after.
I suspect you might need to elaborate on the root of your question though. Why are you interested on the load order?