I was able to complete exactly one of these today on Helldive. That shit was intense. Only two of us got off the planet. You just about have to glitch your way to victory, figuring where to put the drill. Pro tip: try to use rock walls to your advantage. The spawns are insane, bugholes appearing beneath the drill. I went with the Blitzer, EMS strikes, Gatling turret, and airstrikes. I'm going to go lie down now.

Happened to me and continually was able to pick up the first one inserted, and as soon as it was let go, it returned to the SEAF. Quantum warhead.

My default is stealth in this game, and I've been in this situation quite a few times. Having started the game with others, this first suggestion might not have been possible, but what I like to do is get the main objective out of the way, call extraction in, throw a turret right next to the terminal, drop all of my samples there too, and get right on the edge of "abandoning" extraction, prone. Enemies come, the sentry takes aggro, and I can usually extract with no shots fired. Doing this first, however, has an added benefit: as soon as the pelican is on the way (the timer reads 0), I leave extraction. The pelican hovers above extraction, and fires on anything in range. Instant everything obliterator. Then I'm free to do everything else I want to do without the stress of extraction hovering over, because extraction is hovering over (hey-o).

Outside of that last bit, the TL;DR is, in a word, stealth, and, to expound a bit, lose aggro, call extraction, drop samples at extraction, do not gain aggro, and best practice is to stay off of extraction as long as you can, so if you get swarmed, you're not swarmed on extract, but somewhere else, and extraction is kept relatively un-rowdy.

Thank you for coming to my TED talk. Edit: spelling

Got what I expected, endorse what I got.

Professional lurker here, and I've stayed out of... everything, but, not siding with should we be posting jean memes or not, shouldn't this be "jaby joll? " :: lurker smoke bomb::