Is it possible to have multiple stencil reference values in one shader?

I'm fairly new to Unity and C#, let alone tampering with shaders. At the moment I have the result I want, but I think it can be done more neatly/optimized.

I have multiple identical shaders with each its own stencil reference value. Is there a way to combine them, as in having multiple reference values in one shader or another way of optimizing my shaders?

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I'm not experienced enough to create my own shader, so I just tried editing an existing shader (Sprite-Diffuse) and applied that to my sprites.

What I have are multiple layers of sprites (e.g. body, hair, clothing, etc) all forming one character. When the character collides with another sprite (e.g. blood), I want the second sprite to stick onto the character on the right layer and get cut off at the edges of the sprite.

I now have a mask shader with a reference value in the stencil buffer for each layer (body, hair, clothing) and use the same reference value in the shader of the other sprite

In the mask shader I have:

 Stencil
 {
     Ref 1
     Comp always
     Pass replace
 }

and in the void surf of that shader:

 fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
 if (c.a<0.1) discard;

in the shader of the particles I have the same reference value in the stencil buffer, like this:

 Stencil
 {
     Ref 1
     Comp Equal
 }

Now I have multiple shaders with each its own reference value in the stencil buffer, but with the rest of the script completely identical. All works great, but I don't like to have identical scripts working together. Is there a way to have multiple reference values in the stencil buffer? Or is there an other way I could optimize my script?

Thank you for reading