There is no one size fits all pulse setting that works for every application.
The following pulse settings work well on a 16ga stainless outside corner joint if you are trying to limit distortion and discoloration
1 pulse per second
5% background
30% pulse duty
Chill bars can help a lot too when it comes to limiting distortion.
I like the digital readout feature on the primeweld tig 325x. It makes setting pulse rates easier.