In Shadow of the Demon Lord, the rogue's Trickery feature reads:
Once per round, you can make an attack roll or challenge roll with 1 boon. If you attack with 1 boon from this talent, your attack deals 1d6 extra damage)
Similarly, the Backstab talent reads:
One per round, when you attack with a basic or swift weapon and you make the attack roll with at least 1 boon, the attack deals 1d6 extra damage
How does this apply to boons and banes cancelling each other out? For the purposes of these abilities, are you making attack rolls with x boons and y banes, or (x-y) boons?