Updated Dagannoth Kings DTs

What have you done in this MR?

• Adjusted DTs for Dagannoth Rex, Prime, and Supreme
  • Set Warrior's Ring to 1/128
  • Set Berserker's Ring to 1/128
  • Set Archer's Ring to 1/128
  • Set Seer's Ring to 1/128
  • Set Dragon Axe to 1/128
  • Set Mud Battlestaff to 1/128
  • Set Seercull to 1/128

Are there any tricky things testers should keep an eye out for?

• No

• I have tested these changes thoroughly.

• I used the Thanos Tool for any JSON edits; I did not edit any JSON files by hand.

• I acknowledge that this contribution will be released under the AGPL license.