Crew Roster.
Two PIC's and one SIC.
https://scontent.fsnc1-4.fna.fbcdn.n...19&oe=58B8F727
The plate shows the glideslope intercept as being D4.5 RNG QDR 006.
Glideslope intercept is at 9.5 miles on the IMDE (localizer) or at .6 miles north of the RNG VOR. (At this point you should be tracking the LOC frequency.)
One possibly explanation is when the lights went out they thought they were holding 5 miles south of the runway on the localizer and not 5 south of the RNG VOR. That would the explain the excessive descent from the hold.
Even overweight causes underperformance, fuel consumption might not valid.
This cannot be stressed enough. They may have well done this flight before successfully but not at this weight. The fuel planning may have looked doable (still not legal) without the MGTOW of the aircraft entered into the FMS.