Not a T6 hike.
Easy hike until shortly after Hanauer Hütte, then scree/snow fields until the mountain pass is reached. From 2425m on scrambling: often grade II, one part in difficulty III.
3 hours of climbing in grade II after the Schlüsselstelle III in the beginning. No securities but route is marked throughout.
Rock is very good, only few loose holds but lots of stone rubble everywhere. A little exposed in parts.
Bring a Helmet!
There is a nice documentary available:
https://www.youtube.com/watch?v=Ub7-0za-zKM