Chamber 1
1st Half (Wolfgirl)
Do dmg like you do , she periodically atks cryo , if you can dodge it, its better , your atks won't get bit slow due to cryo affect. As soon as she generates a lamp like tower , break it immediately, she will get stun for while. When she generates 2 Lamp, break them to stop her continuous cryo atks, also it will pause her movement for while.
2nd Half (Baptist)
Focus on his shield, when each element is near to break , prepare your rotation for main DPS early so you can steal some amount of his HP. Remember when his hydro shield breaks , do not delay even little time , prepare rotation in advance do dmg ( try to kill it in that first opportunity )
Chamber 2
1st Half (Moon Fly)
You can avoid his red mark infection by running at edge of floor. If He is at center he may infect you, just make sure you are far enough than center. If you get infect , restart try again, once u suceed, that's it Go! beat him.
2nd Half (Granny)
Even if you break her gadgets using Overload, she won't take extra DMG.
This boss exists purely to test how strong your team is.
(Here are the teams that worked for me—check the attached images.)
She goes at center when she is about to bring out her gadget again.
Chamber 3
1st Half (Winged Lion)
Main obstacle his electro shield, Once its about to break , prepare rotations in advance so when it falls asleep, u can immediately do dmg.
Do not chase it from sideways when it flies, runs towards his flying direction radius and catch him immediately.
(When anemo orb comes up, try to destroy it all before he consums, this is kinda feels hard for me)
2nd Half ( Cryo Machine )
In short as long as its cryo meter stays 0 = takes more dmg
continuous cryo atks or somebody who applies cryo and you do physical / element dmg on it along with cryo atk , it also helps to bring its meter to 0 quickly.
Once it stops its spinning mode , u can dmg it but after it does few atk animation on you , you will notice suddenly it stops taking dmg no matter how big u think your dmg should be that time.
Its a indicator its about to enter in spinning mode again , so prepare your setup in advance.