Ehm, the buff doesn't require you to slot an ability, it just requires you to use a staff of the respective element doesn't it? Or did I get that wrong?
Ancient Knowledge: This passive ability no longer decreases the cast time of your Destruction Staff Heavy Attacks by 5/10%. Instead, it grants you a bonus as long as you have one Destruction Staff ability slotted. This bonus depends on your staff type:
Flame Staves: Increases your single-target damage dealt by 4/8%.
Frost Staves: Increases the amount of damage you Block by 10/20%, and reduces the cost of Block by 15/30%.
Lightning Staves: Increases your Area of Effect damage dealt by 4/8%.
Does it work even if you don't wield a Destruction staff? I.e. if you slot a destruction staff ability on your overload bar, does that increase the single target or aoe damage? Or if you slot e destro stuff ability on your duel wield bar or 2handed bar does that increase anything? Or does it only work with a destruction staff ability and a destruction staff being wielded?
Does it work even if you don't wield a Destruction staff? I.e. if you slot a destruction staff ability on your overload bar, does that increase the single target or aoe damage? Or if you slot e destro stuff ability on your duel wield bar or 2handed bar does that increase anything? Or does it only work with a destruction staff ability and a destruction staff being wielded?

