2wd and the springs to use?

[Appie53]

Hi, maybe nothing new, but Guy's is there a simple rule for which springs to use on a 2wd RC and in this case an Ansmann??
Front and rear the same springs, or front medium rear soft, or something else?
Still working on my Ansmann, using the basicdempers, but struggling on using other springs, so that's why my question??

Sorry for my not correct English...........Appie53.