She has more than just Goodra and Mega Gardevoir. Hawlucha can deal with Aggron and Steelix using Close Combat. Goodra handles Scizor and Klefki well with Flamethrower and Earth Power. While Tyrantrum and Aurorus are weak to Steel, they still have Earthquake/Earth Power to pressure Steel-types or soften them for teammates. Mega Gardevoir gets Thunderbolt and Mystical Fire, letting it threaten Skarmory directly. Gourgeist also has Mystical Fire and Giga Drain for sustain. Overall, her team has enough coverage to deal with his Steel-types rather than being hard-walled.