When you reach the NPC at the Western end of the Agoric Spore Road be sure to turn in the Tula's Music Box quest and obtain the new quests he offers. These quests will send you furhter West into the Timolia Mine itself, leaving the NPC headed that way you should have the following quests;

• Suspicious Ore - Collect Ore from crates within the Timolia Mine.
• Scouting the Timolia Mine - Collect Engine Parts from the inhabitants of the Timolia Mine.
• No Entry - The last of the mission quests in this area requiring you do deactivate the gate inside the Timolia Mine.

With these quests complete you should have done everything there is to do within Poeta except Ascension!