[Rain Man]

If the invaders have a force of 300,000, I'd guess their forces to be composed of the following types of troops.

100,000 overweight aimless young guys who don't go outside very often.
70,000 overweight young guys who don't go outside very often, but have extensive experience playing Call of Duty.
40,000 guys with extensive Dungeons and Dragons experience.
25,000 guys who wear tin foil hats and write rants on their blog that has fewer than ten readers
20,000 women who fall proportionately into the above categories.
15,000 people who have been to Burning Man.
12,000 people who just want to loot the place.
5,000 engineers who are legit curious.
5,000 ex-military people who have seen things.
3,000 people who just like being around killings.
2,000 people who just always say yes to stuff.
1,000 PETA people who are hoping to free the aliens.
1,000 idealist dreamers who program in linux and want to release alien technology to all of mankind.
500 people who are wanting to try out their new drones.
300 undocumented migrants who got lost crossing the border
200 South African mercenaries (recruited through gofundme)
100 imbedded journalists
20 ranchers looking for lost cattle
That one former astronaut who writes about alien stuff
That guy who's in the "I'm not saying it's aliens, but..." meme
Randy Quaid
1 hot chick

So how can we come up with a good strategy to best use their individual strengths?