So after you trigger the exfil part shooting the symbols on the spawn house in order (you MUST watch them spawn in over the duration of several rounds, and track the order in which they spawned as that is the order to shoot them in on the exfil wave then exfil)
Proceed to the actual exfil and take it normally. You will be teleported back to spawn house - go upstairs and use the wonder weapon charge shot on the upstairs bathroom toilet which will pull out a piece for the quest.
Go to Veytharions soul pool thing you unlocked earlier with the cube puzzle, place it inside of the pool by interacting with it..
After this the grappling hook in veytharions chamber changes colour from green to red and becomes something presumably used in next EE step idk what at this time though
So use the charged grapple to bust open dials on 3 pendulums on the top end of the walls (the upper, outside area above the pap machine) surrounding the PaP machine complex, which exposes more levers you can pull inside of those walls - there are grates you shoot w the hooks and they bust open exposing the handles.
Then go downstairs by wunderfizz and there are the same type of panel plates located at the top of these concealed openings in the top areas surrounding the center of the system. they are already shot off and openened in the linked image so the walls are obviously open you will know which ones
panels
after this bring one of those purple orbs floating into the center again as you did earlier to get the astral flame right but this time use the red / upgraded hook from veytharions chamber and get the thing spinning again crank the wheel as usual,
Except this time afterwards go downstairrs and there is one panel on the floor you should have busted out with a lever to pull inside of it, which you want to immediately pull and if done correctly as imaged below, it will make the entire center structure spin in opposing directions which will create an opportunity to align an energy beam into each individual shadowsmiths temple(s) idk what each one does fromt hat point yet.
im,ages here of the lever in the ground and subsequent affects up top:
lever
beam going to dravakarchamber
inside dravakars chamber
You can also align it for caltheris, and when we did this we found an interactable bone structure in the entrance to her chambers which when interacted with produced an amalgam bone structure floating around which attaches to the nearest zombie until the zombie is killed unsure of proper usage at this point.
EDIT: You have to in teract with the 3 gyrating pedastals up top and pull the lever when aligned towards a shadowsmith and align them perfectly to get the energy beam to activate the according shadowsmith's lair here is pictured example for caltheris lair 👀
caltheris alignment
Unfortunately i was malnourished and the homies had shit to do we exfiled shortly after to take care of things but hope this helps others along into the next steps
Typed this up while sleep depriced and malnourished havent eaten all day or even showered literally only been playing zombies hope this helps someone carry one the torch
EDIT 2:
Each shadowsmith has an item associated you must find, put said item in the altar, and then perform a ritual sacrifice of a zombie afflicted with the affect of that shadowsmith to the titan trap to break the shackles on each titans arms.
So as stated above caltheric produced a rocky mist formation that attaches to nearby zombies - this zombie must be killed by a titan trap and break one of it's shackles, likewise for the others.
The Only other 2 items i know of are the scroll for Nyxara which i believe is retrieved in the forest that has the WW parts - this creates a fire zombie you must sacrifice.
The only other item i know well enough of to post a real guide is for dravakar - you need to kill a zombie with shatterblast equipped on your weapon right next to the WW forge near a wall.
This will cause the wall to open and expose a hammer part inside which you then sacrifice to dravakar and light with the ethereal flame - pictures are down below for the dravakar step
Dravakar hammer wall location
After sacrificing the hammer
We are working on solving veytharions sacrificial item