Can someone help me gain exp with my script?

Questions & Answers
1

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
public class DamageManager : MonoBehaviour
{
public int HP = 100;
public int HPmax = 100;
public bool CollideDeath = false;
public int Armor = 0;
public int ArmorMax = 100;

public int Level = 0;
public int MaxLevel = 100;
public int CurrentExp = 0;
public int ExpMax = 1000;
public int ExpAmount = 1;

public GameObject DeadReplacement;
public float DeadReplaceLifeTime = 60;
public bool isAlive = true;
public AudioClip[] SoundPain;
public AudioSource Audiosource;
public string LastHitByID = "";
[HideInInspector]
public int spawnLevel;
[HideInInspector]
public bool dieByLifeTime = false;
[HideInInspector]
public bool spectreThis = false;
public string Team = "";

void Start ()
{
	Audiosource = this.GetComponent<AudioSource> ();
}

private bool isQuitting = false;

void OnApplicationQuit ()
{ 
	isQuitting = true; 
}

void Update ()
{
	UpdateDamage ();
}

public void UpdateDamage ()
{
	if (isAlive) {
		if (HP > HPmax)
			HP = HPmax;
		
		if (Armor > ArmorMax)
			Armor = ArmorMax;

		if (Armor < 0)
			Armor = 0;

		if (CurrentExp >= ExpMax && Level < MaxLevel) {
			Level = Level + 1;
			CurrentExp = 0;
		}
		
		//if (Network.isServer || (!Network.isServer && !Network.isClient)) {
		if (HP <= 0) {
			isAlive = false;
			if ((!Network.isServer && !Network.isClient)) {
				AfterDead ();
				GameObject.Destroy (this.gameObject);
			} else {
				if (networkView.isMine) {
					OnDead ();
				} //else {
				//networkView.RPC ("OnDead", RPCMode.Others, null);
				//}
			}
			
		}
		//}
	}
}

void OnTriggerEnter( Collider deathVolume ) // C#, type first, name in second
{    
	if (deathVolume.gameObject.tag == "InstantDeath")
	{
		HP -= 10000;
		if (networkView.isMine && (Network.isClient || Network.isServer)) {
			networkView.RPC ("HPUpdate", RPCMode.Others, HP, Armor);
		}
	}
}

void OnCollisionEnter (Collision collision)
{
	if (CollideDeath) {
		isAlive = false;
		if ((!Network.isServer && !Network.isClient)) {
			AfterDead ();
			GameObject.Destroy (this.gameObject);
		} else {
			if (networkView.isMine) {
				OnDead ();
			} //else {
			//networkView.RPC ("OnDead", RPCMode.Others, null);
			//}
		}
	}
}

Vector3 directionHit;

public void ApplyDamage (int damage, Vector3 direction, string attackerID, string team)
{
	LastHitByID = attackerID;
	directionHit = direction;
	if (HP < 0)
		return;
		
	if (Team != team || team == "") {
		if (Armor > 0) {
			if (damage > Armor) {
				Armor = 0;
				damage = damage - Armor;
				HP -= damage;
			}else{
			Armor -= damage;
			}
		}else{
		HP -= damage;
		}
		if (networkView.isMine && (Network.isClient || Network.isServer)) {
			networkView.RPC ("HPUpdate", RPCMode.Others, HP, Armor);
		}
	}
	if (Audiosource && SoundPain.Length > 0) {
		Audiosource.PlayOneShot (SoundPain [Random.Range (0, SoundPain.Length)]);	
	}
}

public void HealDamage (int heal, Vector3 direction, string attackerID, string team)
{
	if (HP < 0)
		return;
	
	if (Team != team || team == "") {
			HP += heal;
		if (networkView.isMine && (Network.isClient || Network.isServer)) {
			networkView.RPC ("HPUpdate", RPCMode.Others, HP, Armor);
		}
	}
}

public void FixArmor (int restoreArmor, Vector3 direction, string attackerID, string team)
{
	if (Team != team || team == "") {
		Armor += restoreArmor;
		if (networkView.isMine && (Network.isClient || Network.isServer)) {
			networkView.RPC ("HPUpdate", RPCMode.Others, HP, Armor);
		}
	}
}

public void DirectDamage (DamagePackage pack)
{
	ApplyDamage ((int)((float)pack.Damage),pack.Direction,pack.ID,pack.Team);
}

[RPC]
void HPUpdate (int hp, int armor)
{
	HP = hp;
	Armor = armor;
}

[RPC]
void OnDead ()
{
	Network.Destroy (this.gameObject);
	Network.RemoveRPCs (networkView.viewID);
	AfterDead ();
}

void AfterDead ()
{

	CharacterItemDroper itemdrop = this.GetComponent<CharacterItemDroper> ();
	CharacterSystem character = this.GetComponent<CharacterSystem> ();
	if (character) {
		if (character.gameObject && character.gameManager.ScoreManage) {
			
			if (character.ID == character.gameManager.ID) {
				character.gameManager.ScoreManage.AddDead (1, character.ID);
			}
			character.gameManager.ScoreManage.AddScore (1, LastHitByID);
			GiveExpToKiller();
		}
	}
	if (itemdrop)
		itemdrop.DropItem ();
}

public void GiveExpToKiller ()
{
		expCalculation (ExpAmount);
		Debug.Log ("Exp Gained");
}

void OnDestroy ()
{
	if (!isQuitting && DeadReplacement && !Application.isLoadingLevel) {
		Network.RemoveRPCs (networkView.viewID);
		GameObject deadbody = (GameObject)GameObject.Instantiate (DeadReplacement, this.transform.position, Quaternion.identity);
		if (spectreThis && deadbody) {
			LookAfterDead (deadbody.gameObject);
		}
		CopyTransformsRecurse (this.transform, deadbody);
		if (dieByLifeTime)
			DeadReplaceLifeTime = 3;
		
		GameObject.Destroy (deadbody, DeadReplaceLifeTime);
	}
}

public void CopyTransformsRecurse (Transform src, GameObject dst)
{
	dst.transform.position = src.position;
	dst.transform.rotation = src.rotation;
	if (dst.rigidbody)
		dst.rigidbody.AddForce (directionHit, ForceMode.Impulse);
	foreach (Transform child in dst.transform) {
		var curSrc = src.Find (child.name);
		if (curSrc) {
			CopyTransformsRecurse (curSrc, child.gameObject);
		}
	}
}

void LookAfterDead (GameObject obj)
{
	SpectreCamera spectre = (SpectreCamera)GameObject.FindObjectOfType (typeof(SpectreCamera));
	if (spectre) {
		spectre.LookingAtObject (obj);
	}
}

public void expCalculation (int amount)
{
	if (networkView.isMine || (!Network.isClient && !Network.isServer)) {
		Experience(amount);
	}
}

[RPC]
void expUpdate (int num)
{
	CurrentExp = num;
	Debug.Log ("Current EXP: "+num);
}

public void Experience (int num)
{
	CurrentExp += num;
	if (!networkView.isMine && (Network.isClient || Network.isServer)) {
		networkView.RPC ("expUpdate", RPCMode.Others, CurrentExp);
	}
}

}

It reaches GiveExpToKiller after the kill but does not grant the exp to the player character.

2

You could merge GiveExpToKiller, Experience and expCalculation in one function to gain some overview in the mess. Add one more debug to see if it called on the server or client.

public void Experience ()
{
   CurrentExp += ExpAmount;
   if (!networkView.isMine && (Network.isClient || Network.isServer)) {
       networkView.RPC ("expUpdate", RPCMode.Others, CurrentExp);
       Debug.Log("Experience():" + (Network.isServer?" Server ":" Client ") + CurrentExp.ToString());
   }
}