How can I change the depth of an ortographic view? (z-fighting issues)

I’m experimenting Z-fighting issues with my 2D games … I want to know how could I change the depth resolution for avoiding these issues.

I can have like in the order of 10 layers and should not be z-fighting at all. Ideally I would like to make all Y-values of my objects to be representable. Right now I have to separate the objects by a large margin (Y = 10 or even more) for avoiding Z-fighting in some android devices.

Is there a quick and fast workaround?