Oh, my, fucking, god this works! i love it! i just had an awesome game 35 waves in on eli on europa, and my god, i got split chamber on wave 35, was the best game ive ever had, made good friends, your guide made it happen, we were going to give up, fuck that game was intense!
This guide is very accurate, along with the list in the link, i give it a 100% satisfication thumbs up! my only regret is that i had no recoring set up!
To be clear, doing T3 corpus defense is the fastest known way to get this since you only need to do 5 waves for a chance rather than waiting till enemies are high enough level to get a chance. Lower level corpus defense missions might be easier but the enemies still need to be 25+. Thalassa is the lowest level corpus defense mission that starts enemies above 25. It's only level 44.
Thank you 5 times over for this! This works just as well on ps4. I just spent 3 days farming Narcissus for split chamber with no luck, but I got it on my 3rd try on Kiliken with this guide. It was on wave 15 if anyone is curious.