People do it on SS, but they are crazy imo.
Relentless course the last 2 years has been hillier than 10 under (packed almost as much climbing into a lap 5km shorter)
Basically 2 main climbs/2 descents per lap with a short steep climb between the two main climbs.
First climb spilts in two, with a 10-12% climb, a short rest, then a 12-20% climb.
The mini climb that takes you up to the 4X course is very short, but brutally steep.
The final climb is a much more mellow flowly climb that would work well SS.