Does anybody have an idea where exactly to look for these or could at least confirm they are actually dropping right now?

I have been farming Kingdom of the Sands (Madness) for quite some time and have not encountered a single one. While I have numerous Mystical ones and some Overwhelming - which seem absolutely useless -, Ward just doesn't seem to exist.

At first I stuck to the higer levels, including Horus and up to three nodes before him but started to varry more when I had no luck there. No idea if the node actually affects the item dropped or just increases the chance of more drops.

While we are at it, Penetrating Talismans seem only drop for me as Sorcery, is this a common problem similar to assassin shields or just bad luck?