I didn't I honestly just walked thru the thing to finish it
Ah, I hope you have a save pre-dungeon still.
And to quickly summarize the steps to get Olivia:
-go to her tile, it is located on the right side of the dungeon.
-there is a option to make a deal with her instead of fighting, pick that and you'll get a new quest.
-go to the left side of the dungeon, find the alchemist fellow (his tile is the node off of the corrupted pool with a chest at the bottom).
-fight and defeat him and his two allies.
-report back to Olivia and go through her dialogue, one should bring up where she is going after the dungeon.
-pick the wayfort option, then finish out the dungeon.
You will know you've done it right the next time you visit the throne room (or was it the tile above?) When you are back at the wayfort.
