Possible Clues:

• Doomed — bored
• In seas unkind, as were the 10 and 17 — by 15 and 19 down
• Sent to bed after daily smack on bottom
• Fell to the ocean floor, say
• Gone to Davy Jones' locker
• Descended from Louis XIV but not in forefront of government
• X'd out completely, in the game battleships
• Went down at the start of the week and weekend
• Suggesting Louis XIV collapsed?
• Like a ship on an ocean floor