Mount Rolleston Challenge: Runner VS Flyer

Paraglider & climber David Chen, mountain guide Joda Dolmans, and trailpinist Alastair McDowell race up and down the iconic Mt. Rolleston (2271m) in Arthurs Pass.
From the Otira Valley they climb the Otira Face 'Central Direct' route, approximately 600m vertical from the head of the valley, NZ alpine grade 2+ (4th class scrambling), topping out directly on the High Peak.
The descent route involves weaving over the Middle peak to the Low Peak. For the runners, they head down via the Otira Slide, a long scree slope down into the valley, and several kilometres of rocky river side trails.
For David, he will fly off the summit of Low Peak with his 'run & fly' rig, trying to catch Alastair on his run down to the carpark.
Who will be the first back down?