I run mine at 96......20 on the masking.....and turn on the auto tracking after balancing.
Usually if I try to go to 97 I start getting some chatter.
96 seems to be the magic number here for me.
You want to run as high as possible to get better depth.
If you have a lot of iron in your area, you may want to lower the masking to 10, or even 5. I've seen post on here that say that the lower masking helps the Core to
separate the good target from the iron. I don't have a lot of iron on the beaches here to contend with so I run the masking at 20.