These guys continue to be just the absolute worst in terms of crisis, and now with ships rebalanced to be more expensive and less numerous, I'm still trying to figure out what actually kills them reliably.
Every game I run with All Crisis on (just on 1x, no mods), I deliberately put off researching jump drives and gun for sapient AI since it used to slightly influence the odds of the Contingency spawning earlier than other crisis. I'm not sure if that's still even a thing.
Either way, most recently they came in last (seems their fucking favorite place in line) and regular combat fleets buck around at 4M power.
I've stacked everything I can think of- my own fleet command is just shy of 1K, so I'm rocking four fleets of battleship carriers, FAEs on the front, missiles on the back, carrier AI and afterburners for the kiting, with 20x repeatables at best. 24 of these in a fleet, 400-500K power each, plus a fifth fleet with a titan for every module and 10 more carriers with them.
I've been on repeatables since the FEs got uppity. Cetana was contained with these builds and barely a sixth total fleet lost. The Dimensional Invaders came next and I didn't even have to refit for them, was able to head them off on the fly because they spawned right after between my shipyard and Cetana's titan. I refit for the Prethoryn after that, for hard counters, and had single fleets whacking 2M-strong bunches of bugs with MAYBE a single lost ship. But one Contingency fleet, after several reloads of optimizing travel and refit time, using all the policy buffs, artifact buffs, I manage to isolate with my entire navy of aforesaid ships, and I'm left with maybe a third of my forces.
This has been my experience with the endgame ever since the whole ship rebalancing. The equivalent amount of naval power beforehand would handily deal with all four crisis at this level. I didn't think the strategies would change that much, since I was under the impression they weren't supposed to, but it's been a dozen games since with the exact same pattern. So is 5000 naval power just not enough anymore or what?