What Battery preset should I have. I have regulator smartsolar 75/15 with victron energy gel 12 165. BAT412151104
Here is the datasheet for your battery:
Study that to give yourself a good understanding of how to use your battery.
Then you can make an informed decision on which charge profile you want to select.
I think you'll then agree that one of the "Victron Gel" profiles fits your needs.