If you use 9x XML2 at ~3A/3.5V (actually a bit lower) that would take ~94.5W.
For XHP70 3x 3.6A at 8V (3000 lumens each) = 86.4V
Most flashlights approaching that range use ramp down drivers. They reduce current after a few seconds to prevent overheating. If you need 9000 lumen for longer durations you’ll need a larger case, probably with fan cooling.