As an update to the map above, the creatures have split up. the large creature is still indicated by the circle, the smaller is ten feet north of it. Grayson is almost on the grating just outside the elevator shaft, a mere ten feet away and thirty feet above the large creature.
The smaller creature in the lava pool that Rylee has spotted is in the second pool from the right. Everything else is spot on in the map then.
Lorelai is in the elevator shaft waiting to be lowered to the access panel on Andreev's signal (most likely with a foot still on the floor of the room). Lucas and Stewart are holding line in the square directly south of the shaft. Andreev is supervising from a few feet away. Lt Reed is next to him. Campbell is watching the stairs up (thirty feet from the elevator shaft). Krizzel is quiet and was last seen around Lorelai's belongings.
I think that covers everyone. Let me know if I've gotten anything wrong there.
Keia