I've been playing this level over and over again, and can't seem to get a good strategy going, It always seems I have to spread out way to thin to be able to cover everything, but once the hp starts getting to high I cant do enough damage to one particular area. Usually I'd focus on getting quad cannons asap, using the green lasers just to get the strays. THat strategy isn't working on this map. so any advice on how you guys beat the map would be appreciated. thanks.