Guild Wars 2

interesting factoids about i guess all utilities but certainly signet of air.
arcane power makes it crit and so it can activate the burning and vulnerability trait and maybe weapon bonuses. i got bleeding from signet of air and i assume that it came from the bleed on crit signet i had.
it also gets might from the fire 30 trait when used from fire.
signet of restoration however does not do any of that.

so if that true… do all utility skills that do damage do this?

Everything you do, even attunement switching, counts as casting a spell.