I’ve done that mission about 25-30 times and every time we failed was due to the bad spawns on the last escort. Those spawns are not normal. You need a very good team to clear that up quickly and that doesn’t correspond with the normal difficulty.
People play on normal to learn the maps and their heroes. Not to spend 20 minutes to fail a mission because the sentry against all expectations and logic throws itself far ahead leaving lots of enemies behind into more enemy spawns.
The mission failure rate speaks for itself, anyway. I’m sure The Archive is the second most-failed mission after The Saboteur.
Just in some weird case you’re thinking this post is about me having difficulties, it’s not and I’m not. I’m rank 39, I’m topping on damage almost every game and I know all maps like the back of my hand. I’m saying, from enough observation, that the spawns are unbalanced and they subvert people’s expectations. People don’t expect a sentry to behave like that. It’s unnatural.