At the top of the TSA chairlift lift there is a blue slope, but you need drop onto the other side of the mountain, towards the Faverges area. This is a really straightforward line, but heading skier's left is dangerous since there are many cliffs. Drop the first couloir (fall-line from the chair lift on the Faverges side of the mountain), and go directly all the way to the left where you can follow almost all the way down to the river at the valley bottom. Where the run opens to a wide area, you can go all the way down to the river or you can cut skiers right a bit before, which saves a bit of flat skiing at the exit.