Keep components as fields inside a script?

Hi all. Suppose we have two scripts like ScriptA and ScriptB for obj1.
Then ScriptC for obj2 has an array of obj1 and needs to access to ScriptA and ScriptB objs1.
We can write obj1.GetComponent<ScriptA>() and obj1.GetComponent<ScriptB>()
or can write ScriptA scriptA=obj1.GetComponent<ScriptA>() and scriptA.scriptB, if we have

Code (CSharp):

1. public class ScriptA:Monobehaviour {
2. ScriptB scriptB;
3. }
4.  

but it creates extra depandancy and coherence. How can we reduce these coherences?
Do we keep the references of components only when we need them inside the script?

 

Short answer is: yes - don't junk up your behaviours with references they never use (the compiler even warns you about this).