Enemies come fast, hard, and plentiful. Orange drops on your base with multiple dropships of 2/2 upgraded enemies before you can really get an economy going. I need to build a massive wall of Missile Turrets just so I don't have to stress about them so much. Late-game they mass-produce 3/3 Battlecruisers. I thought to create a ton of Wraiths and try to snipe the heroes, but Kerrigan alone has 750 HP and 6 armor, so that wasn't happening. From missions 1-3 to this one, this is a colossal difficulty spike. I couldn't manage to beat it at all and I'm out of ideas.