How many Accent XL treatments are needed for optimal results? What is the waiting period between each session?

Instead of a nose job I am considering using fillers to fill in the gap on the bridge of my nose. Can any filler be used?

Should i increase the SPF to 30 or higher?

I had under eye surgery but continue to have puffy eyes. There is also some puffiness around the contour of my cheeks. Could the Accent XL procedure help reduce the puffiness in these areas?