No CFIT without fuel, I guess.
If I understand right what I´ve found electrics on the RJ come from two generators (gone) plus the APU (gone) and a battery. No ram air turbine if I´m informed correctly. The hydraulics would have had to be provided by electrical power. I doubt battery alone would provide enough power for very long enough to provide hydraulics as well as keeping basic instrumentation going.
Flying only privately I would not consider planning to the absolute edge of my theoretical max performance or maybe beyond at night into a demanding airfield.