In a set where Avengers shine, Agent 13 stands out by... Well by not being an Avenger! If you still choose to call her to battle, she'll massively help you with that evergrowing threat level, both immediately and for a couple of turns. Captain America can always make her an honourary avenger to boost her up. She's a life saver in these tight solo games where threat blows up real fast, in a Captain America deck already well built for solo play.