Corrected Lighthouse Dagannoth DT

What has been done in this MR?

• Take over !1615 (closed)
• All I did was rebase and make sure that roll drops on 1338 looked reasonable

What should testers check?

• Check !1615 (closed) to see what should be done.

• I have tested these changes thoroughly.

• I Von used the relevant Zaros tool for any JSON edits where possible, and have attached screenshots of any changes.