Mrnutt, are you thinking about a different race? 80-100km days for seven days at full race pace on a 7" full suspension bike? ; )
The Five might make more sense but i’d have my current bike (Charge Duster with 4" rebas, XT discs and tubeless mavic wheels with a shimano drivetrain, ti seatpost , flat bars and stubby bar ends) but with the top of the range equivalents, so
Ti Duster Frame
4" Reba world cups/teams
XTR discs
Continental Rubber Queen 2.2 tyres on whatever the lightest tubeless set up is atm, Stans?
Moots post (comfort and lightweight)
XTR drivetrain with maybe some extra thought put into the crankset, Middleburn on SKF or something similarly robust
Prologo Vertigo Max saddle (personal, but the fat nose makes seated, steep climbs easier)
I don’t think that race takes many prisoners, but the above bike would be light, tough yet capable on descents.