Based on recent reviews and overall reputation, here's a ranking of the mentioned resorts:

1. *Four Seasons Resort Bali at Sayan* - Consistently receives high praise for its exceptional service, unique setting, and overall experience. It’s often considered one of the top resorts in Bali.

2. *Mandapa, a Ritz-Carlton Reserve* - Known for its luxurious accommodations and personalized service, this resort is highly rated for its serene atmosphere and attention to detail.

3. *The St. Regis Bali Resort* - Well-regarded for its elegance, high-quality service, and beachfront location, it’s a popular choice for luxury travelers.

4. *Bulgari Resort Bali* - Praised for its stunning design and exclusive feel, though it might have slightly fewer reviews compared to the top three.

5. *The Mulia, Mulia Resort & Villas* - While still highly rated, it often ranks slightly lower than the others for its size and more conventional luxury experience compared to the more intimate settings of the top-ranked resorts.

Ratings can be subjective and may vary, so it's helpful to read recent reviews and check travel websites for the latest feedback from guests.