Hi, 
Although these paths leading up to Sandviksfjellet are steep, they do not fit the wiki for sac_scale  demanding_alpine_hiking as this requires good mountaineering experience, and knowledge of elementary rope and ice axe techniques. It's understandably harder to go down than up on these paths (which I suspect you might have done), but I think demanding_mountain_hiking is more suitable. Strava heatmap also shows significant usage of these paths.

I also think they should be tagged as paths rather than footway as they are trails on the side of a mountain rather than walkways in a residential area.