This has been working for me, not sure it's the fastest. Both pets are worth getting, so you can use this for 28-30 or 28-35, save some time on rebuilding for a 32-35 run.
Party: 1 TB monk at Hint 5, 2 summoners with monk/huntress pets at Hint 1 and Hint 2, 1 Builder App (hiding near hint 5)
Total Time 28-30: 2:30 + 2:00 = 4:30 (for flying saucers only)
Total Time 28-35: 2:30 + 8:30 = 11:00 (for flying saucers, moons, and random eom loot)