What is the best agent to counter Killjoy?
To be fair, any duelist would be great to take out Killjoy before she becomes a nuisance. But, in my opinion, Neon would be the best agent to take out Killjoy. Her enhanced speed allows her to push sites like no other agent, making her a constant threat to sentinels. With one good push, Neon can bring Killjoy down.