I see I haven't posted anything for a long time.
Well today I finally went there, which I really wanted. First I went to Trbiška Krniška špica past bivouac Gorica all the way to Krniška škrbina, from there continued right on the Normal route all the way to the summit of Trbiška Krniška špica. The path is really well marked with cairns, a bit poorly at the start, then better and better. Climbing to the top is barely II grade.
I descended the way I ascended back to Krniška škrbina and from there continued on the Pot Stoletnice path all the way to the saddle west of Visoka Bela špica and from there also on the Normal route to the summit of Visoka Bela špica. The ascent to Visoka Bela špica seemed considerably more demanding to me, even though there's only 100m of climbing. Climbing there is around II-III grade. The wall is pretty steep too, the view from below on the wall confirms it, rock is quite decent. For descent there are equipped belays, but I didn't need them anyway. Weather was really phenomenal.