Unity compilation order

Hello, I am working on a C# project which needs to utilize a js library. However that js library its self utilizes..... C# libraries!

To get this to work properly, I will obviously need to set up a build order like this:

Step 1: Build C# libraries that the js library uses Step 2: Build the JS library Step 3: Build my own code

I read that one can use the Standard Assets folder to control the order of compilation... So I set up a little mockup of my problem...

First, I created a project with two script files:

One.cs:

 using UnityEngine;
 using System.Collections;
 public class One : MonoBehaviour
 {
     void Start ()
     {
         Debug.Log(Two.myFunc());
     }
 }

Two.js:

 #pragma strict
 public static function myFunc()
 {
     return "Twrooooooo!";
 }

Finally, my hierarchy was setup as so:

 Test.scene
 One.cs
 Standard Assets
 -Two.js

This worked great! Perfectly!

However, my mockup was not complete, so I extended it, changing two.js to:

 #pragma strict
 public static function myFunc()
 {
     return "Twrooooooo!" + Three.myFunc();
 }

And adding a third file, Three.cs:

 using UnityEngine;
 using System.Collections;
 public class Three : MonoBehaviour
 {
     public static string myFunc ()
     {
         return " and Thwreeeeeeeeeee!";
     }
 }

I then made the heirarchy look more like this:

 Scene.scene
 One.cs
 Standard Assets
 -Standard Assets
 --Three.cs
 -Two.js

And now, I am getting the error:

 Assets/Standard Assets/Two.js(4,32): BCE0005: Unknown identifier: 'Three'.

So it appears that I cannot have multiple layers of standard assets folders for maximal control of build order!

This leaves me wondering, how CAN I control my build order to achieve a three stage building of my assets? Is this possible? I do not have Unity Pro.