It's weird how overload bow is more consistent with staggering than SMG Overload.
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The smg and sword versions need multiple hits to build to a stun. They kind of suck.
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you cant even catch overload champions with sword, im pretty sure they put it in game to make dps on tanky target while you receive less damage from it in combination with passive guard
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You can catch them. It just isn't always fun or easy. Swords are already solid choices for most champs. They probably just wanted to try giving us more versatility, but made it underwhelming.
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You have to be fast but you can hit them with the sword mod and stun them But it is still not worth using the overload sword mod over Divinity/Bow. They're much more reliable.