I decided to dick around during the interview to be accepted into Tchortism, saying things like 'yah, i smothered a baby', etc. They attacked me and i decided to go on an rampage because...why not? I killed everyone in the Institue including Eidein after many tries and acessed his elevator. Just when i pressed the elevator to the Deep Carvens, the Faceless attacked and now I am totally ***ked since no amount of reload can save me this time due to their overwhelming firepower.
Question: Has anyone ever succeeded in what I am trying to do, basically kill all Tchortists and the Faceless at the elevator? If so, will there be any consequences, say a positive relation with the Faceless? Shouldn't the Faceless not be hostile to me, the one who killed Eidein for them?
The faceless don't know at this point that you've killed all tchortists, including Eiden. If you talk to the faceless in west wing - which you can, provided you've saved him in core city - he will warn you that they basically attack on sight, and won't stop to chat. Considering that they are staging a big offensive, it wouldn't even make sense for them to pause and check if this one guy isn't the enemy.
Unfortunately, once you attack the tchortists (or they you), there is no way to leave the institute (well, there is a way, but you won't be able to return, thus breaking the main plot). You can however progress further, that's what my mage, who also failed the interview, did. At the elevator, you need to wait out the time until the lift arrives, and then board it. I think it takes about five turns; you can keep most of the faceless at bay by throwing cocktails (plenty of tchortists drop them) at the space between the barricades. Some will pass, but not all. You don't even have to kill them, my mage boarded the elevator with one of those armed rats, and it miraculously dissapeared on the way down.