The advantage Infernal Bond, for Life Essence, makes it deal toxin damage, but it doesn't seem to count as a ranged attack. I found out when trying to use it with the specialization Enhanced Mending under the overseer tree to refresh runes by using ranged attacks.
It seemed like that was supposed to be part of the advantage, so I thought it might have been a bug. I didn't know though so I'm posting about it here as a suggestion to address it...
A potentially better option would be to add a free advantage (cost of 0) that you can add to Life Essence to make it count as a ranged attack that you can grab, but only if you already have the Infernal bond advantage. That way we could choose if we want it or not (though I don't know why you wouldn't want it to count as an attack for that rune combo.
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