My baby's jaundice started high 200+ and slowly decreased, but it didn't decrease within the time frame that they gave us, so in the end baby had to be pricked for blood twice until his jaundice level went below 100.
What we ensured was that he drank milk regularly so that he would poop and pee the jaundice out. Mil went to the sinseh shop to get the thing that helps bring down jaundice (not sure what it's called in eng or chi, but she calls it buah batik in malay). We didn't sun him often, but we did bring him around for walks.
Hope your baby's jaundice level gets better soon!