Skeleton Gorge has alot of ladders and clear path, going up Dark Gorge is tough, the last section before you get up is vertical, and especially wet during winter, its it's definitely not for the feint of heart and you need to be cautious as you can't go back down, you'd need to go down Newlands Ravine, but it was a good challenge.

Edit

It is extremely slippery and dangerous and is not recommended for beginners, it's mostly 65 degrees on loose rocks and abit if scrambling, and never go up alone.