Possible Clues:

• Most lively triremes at sea
• Joyous to the max
• Christmas superlative
• Bad times to make a mistake held to be most light-hearted
• Most jolly English bishop cramped by troubled times
• Most carefree times lax about sin
• Trireme's rebuilt to be higher than the rest
• Gayest, most jolly
• Most jolly and high spirited
• Almost tipsy on Prime Time at the final wrap with the best spirits