https://www.hikr.org/tour/post86314.html
GPS useful, the path through the forrest is badly marked and easy to lose (especially in Herbst - covered by leaves). Higher up through the rocks with good marks (ret dots), then no path up to Grinnerkopf (but not difficult). Between Grinnerkopf and Elferkogel I had to improvise ;)
Jovenspitze (1892 m) can be climbed on the way down from Pyramidenspitze. However, the entry point is very tricky to find without the GPS. The way to the top is unmarked and without any path, requires experience and very dry conditions.
It is a beautiful and varied route, its weakest link is the 250 ascent towards the end.