Wanted to ask if there is any value of dhan (inclination) when having doubts in Salah , example for a normal person he doubts if it’s his first or 2nd sajdah but he has an inclination that it is his first should he take the inclination or take it as a doubt,

And how would the above case apply for a consistent doubting person

Yes your strong inclination has a value.
Constant doubting person should not pay attention to the doubt