You don't have a chance unless u take down the little witch doc with out taking out his shield .the only way I know how to do it is with the trespasser which ignores shields . I think it's posible to do it with the right set up with a shock northfleet and a fire northfleet but I've not done it even gunserking with 2 of each But any one who thinks they can do a different way that's lagit . I'd love to see it.