Yeah, without a time to go from, it just doesn't explain much. Judgment occurs right near the start of the war, so we have no idea when they left. This could've happened shortly after then, or somewhere closer to the original trilogy. It's not that I care to examine the games storyline too much, as they contradict each other at points throughout their sequels, it's just still weird since I thought she was actually a neat character that could've used more than just, "uh, yeah, she's gone...dead maybe...I think...yeah...or not..., here's your boat."Spoiler
Of the two of us, you've actually beaten it on Hardcore, so that should tell you something about your ability.
I'd love to join you for an Insane Survival run but I'm not sure I'm competent enough yet, especially with my limited time with other maps beside Skyline and Estate.
I feel like Skyline is the hardest of them. Junkyard seems like it should be because of how congested everything is, but Skyline is so tight and open that spammed Grenadier and Boomer explosives easily take out barriers and damage objectives. Island is actually a decent level, it's just that the second area has a straight path to hit the E-hole, making it something that, like Skyline, can easily be damaged by explosive enemies.
I've read that 4 Bairds and either a Hendrick or Cole are great for Insane. If you had two Bairds on the bridge at the first part of Estate, setting up sentries in alternate timing on the railing side closer to the E-hole, while having a Baird somewhat near the E-hole, setting up a Sentry, and have the final Baird by the spot that can overlook both the right and left path, somewhat near where Paduk can climb, you'd have a really strong defense. If you have a Cole player just running around, shooting off Booskha fire while also resupplying, you might be able to hold of that first area for a while.
The upper bridge Bairds would be ideal for taking out Maulers, Serapedes and Boomers, as their shots would be hitting behind them, where they're most vulnerable. If you can hold that first area for at least the first 4 rounds, the team is doing something right.
I don't know if people have noticed, but when you lose an E-hole Locust get some forces back. If you look at the red bar it jumps back a bit. I wish we knew how much it went back, like if they gain half their numbers back, or if it was a generic amount. If it was a multiplied number, you could possibly lose an E-hole strategically. Like if there were less than 5 enemies attacking, and they get 1.5 times their amount back when an E-hole is destroyed, it might be worth losing the E-hole then so that their regained numbers are less than if you lost that E-hole the next round and the Locust had a fuller bar potentially giving them greater numbers.
That's assuming that there's a method to how they regain numbers though. I wish Epic would explain this.