I'm really enjoying this game, but finding it extremely difficult once I hit about the 7th level. If I get an easy mission objective I might have a fighting chance at hitting it quickly and getting out, but if it's a DREADNAUT or multiple land targets, etc. my odds are pretty slim. It seems like the sky is completely full of enemy missiles, VETs, and ACEs, and if I fail to dodge sometimes even a single higher-tier missile I'm toast. And if it's this bad at 7, I shudder to think what it'll be like in later waves.
What strategies have y'all found for progressing further? Particular loadouts that are good, or tactics the AI opponents are vulnerable to?