Use Warder's Field to slow Koga, leaving him vulnerable. If you picked Treacherous Ground, he likely won't be able to escape it. Earthen Guard makes his damage pitiful. If he tries to ult you, use Impasse below yourself to stay above the radius.
Not much you can do against Inara. If you're set on killing her, buy Bulldozer 3 and help your teammates tear down her deployables. Shadow Step her ult if she tries to hit you with it. Don't go in alone, because you don't have the power to finish it.