Guild Wars 2

im guessing this was overlooked. but yea, Dark Armor adds 400 toughness on channeling and the Sig Of Undead is blind to it

Signets aren’t considered channeled spells, GW2 has a different definition of channeled than most games. In most games, channeled skills are those which can be interrupted, in GW2 any skill can be interrupted except instant cast skills. A channeled skill is specifically one where there is a continual effect while casting, rather than an effect when casting is complete.

For example, on your necromancer, the axe skill Ghastly Claws is considered a channel because of the continuous effect while casting, whereas Unholy Feast is not because the effect happens upon completion of the cast. And so far as I know, there are no channeled utility skills, not sure why though.