Add items from array to a new clone and give them values.

Well, let's see if I can do this.

I have a solution in my mind already but it's a bit difficult to explain all of this in text. Plus, I use C# so you have to convert, but the idea and design are the same.)

I made 3 scripts for all of this.

This is the class script for you to easily declare more perks.

 using UnityEngine;
 using System.Collections;
 
 [System.Serializable]
 public class EnemyPerks
 {
     public int id;          // So that even if you mess with the list, you can still find the same perk using its ID.
     public string name;     // Name of the perk.
     public float value;     // The perk's value to add.
 
     // Makes it easier for you to add perks.
     public EnemyPerks(int iden, string nam, float val)
     {
         id = iden;
         name = nam;
         value = val;
     }
 }

This script is where you can make more perks. Attach this script to a game manager game object.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Perks : MonoBehaviour {
 
     public static List<EnemyPerks> enemyPerks = new List<EnemyPerks>();
 
     // Add your own list of perks. It can be as long as you want.
     void Awake()
     {
         EnemyPerks p1 = new EnemyPerks(0, "Agressive", 0.3f);
         enemyPerks.Add(p1);
 
         EnemyPerks p2 = new EnemyPerks(1, "Thief", 0.1f);
         enemyPerks.Add(p2);
 
         EnemyPerks p3 = new EnemyPerks(2, "Drug Addict", 0.6f);
         enemyPerks.Add(p3);
 
         EnemyPerks p4 = new EnemyPerks(3, "Workaholic", 0.2f);
         enemyPerks.Add(p4);
 
     }
 
 }

This script is attached on your clone to create random perks. Attach this script to your clones.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Clone : MonoBehaviour {
 
     public List<EnemyPerks> myPerks = new List<EnemyPerks>();   // This clone's own perks.
 
     public int minPerks = 1;
     public int maxPerks = 3;
 
     // This list of perks all have 0 because this is the default state of this clone.
     // But you can easily change the values if you want a higher base perk value.
     void Awake()
     {
         EnemyPerks p1 = new EnemyPerks(0, "Agressive", 0f);
         myPerks.Add(p1);
 
         EnemyPerks p2 = new EnemyPerks(1, "Thief", 0f);
         myPerks.Add(p2);
 
         EnemyPerks p3 = new EnemyPerks(2, "Drug Addict", 0f);
         myPerks.Add(p3);
 
         EnemyPerks p4 = new EnemyPerks(3, "Workaholic", 0f);
         myPerks.Add(p4);
     }
 
     void Start () 
     {
         // Say you want a mininum of 1 and maximum of 3 perks to add to this clone.
         int numPerks = Random.Range(1, 3);
 
         // Tells you how many perks this clone should have increased in the concole.
         Debug.Log("Num of Perks to Add: " + numPerks);
 
         // Creates a temporary list just for counting and getting a random perk off of it.
         List<EnemyPerks> tempList = new List<EnemyPerks>(Perks.enemyPerks);
 
 
         for (int i = 0; i < numPerks; i++)
         {
             // Pick a random perk fromt the list.
             int randPerk = Random.Range(0, tempList.Count - 1);
 
             // Take that perk's value and add it to this clone's perk's value.
             myPerks[tempList[randPerk].id].value += tempList[randPerk].value;
 
             // Remove this perk from the list so that you won't randomly get this perk twice.
             tempList.RemoveAt(randPerk);
         }
 
     }
 
 
 }

The concept is quite simple but I made it easier to extend and user friendly.