I'm on the US side. If you live in RDU or CLT why would you not bid CLT? RDU-CLT is incredibly easy. Actually RDU-PHL is easy as well most times of the year save for the occasional snowstorm or t-storm. 10 flights a day, most on us some on DAL. RDU-CLT is all Airbus most of the time with 2 jumpseats each. Early 5:00AM dept to CLT and late 10:00PM dept back to RDU.

RDU-DCA is bad despite the frequency because it's all RJs.

I don't know about CLT-MIA but RDU-MIA there are only a couple direct flights a day.