Hey there, Ager's Scepter has Slow, so it is almost guaranteed to be treated like Wicked Implement vs Anti-Barrier Scout, where its Slow means it counted as an Anti-Overload weapon. The situation is a little different for Ager's Scepter (Overload Mod vs Overload keyword), but the rule seems still in place. That is to say, it can only perform as an Anti-Overload weapon on its own terms, slowing through final blows as per the Ager's Call exotic perk, and not able to disrupt Overloads through a sustained beam using the mod's effect. Additionally there has been one other case like this in the past, Devil's Ruin vs Unstoppable Sidearm. Despite the anti-champion effect being restricted to its special firing mode, even the regular shots could not get the benefit from Unstoppable Sidearm.