My wife and I attempted Rotui on November 13th, 2020. The first section doesn't follow a trail. Climb through the woods.
The second section is a steady trail along the spine. Once you reach about 2/3 of the way up, the trail starts to give way in many areas due to erosion. Being as it's on the side of a cliff, it's a bit unnerving. Definitely don't attempt in rain and don't attempt alone.
NIce climb, but slippery and rainy going down. I fell several times, two falls were bad enough to draw blood. Still, this climb is no where near as scary as Mouaputa.