I agree these need to be fixed, but until it is, I can add some helpful advice to work around the bugs. It took us quite a few attempts, but we finally got it. One thing I didn't know until a random told me that is VERY helpful is: If there is nobody in the portals, the oracles won't kill you. This is the most helpful advice ever. So in these scenarios, here is what we did: 1.) 0 people got teleported - Do nothing. Everybody just sit and wait until the next teleport wave (Or just shoot Atheon for free dmg) 2.) 1 person got teleported - Call out or discover the location QUICKLY. Open the portal but DON'T send anybody in. The person inside grabs the relic and runs out of the portal as soon as it's opened. Wait for next teleport wave. 3.) 2 people get teleported - Open the portal and have one more jump in to help, run normally otherwise. 4.) 3 people get teleported - Run as normal 5.) 4 people get teleported - Run as normal, but outside needs to call out if they didn't get all of the supplicants as the portal players will need to jump upon exiting the portals so they don't blow up. 6.) 5 people get teleported - Same as 5, but tougher for the one guy left outside. We finally got the cheevo using these methods. I hope they help you too.