How to optimize the init.values of rates for a dataset or default values are okay?

[Jigyasa3]

Hey all!

I have a slightly technical question. The examples in the manual show that a) we can have different rates (R1,R2,R3,R4,R5 etc.), b) which can have different init.values (eg. R1-0.1, R2=0). Currently, I am following the default values in the example XML file on my dataset. But I wanted to ask a) how can we optimize the best no. of rates (eg- 3 rates or 4 rates), and their values for our dataset? b) can the default value work on every dataset?

Looking forward to some explanation!