Ascent:

From Liezener Huette, go up to the NW to the Kirchfeld plateau. Cross it to the NW/W to the ridge around 1800m.
Go down on the north face until the stream.
Follow the stream down to around 1480m (Grimmingboden), where there is a large flat are where the two valleys meet.
Cross the rivers, and head up a bit to the right (E) of the ridge in front, through the forest.
There's a flat part around 1620m, continue along the ridge (right side is better) until the big rocks around 1850m. Go around them on the W side.

Join the ridge again until the summit. The last few meters are done without skis.

Descent:

Same way. Don't go down too far in the Sonntaggraben (the big SE combe from the summit) as there are cliffs at the bottom.
Follow the path up the the col 1755m (where there are few huts Sumperlam), then cross to Hochmoeblinghuette, and skin back up to Liezener Huette.