diff --git a/Scripts/Mobiles/AI/BaseAI.cs b/Scripts/Mobiles/AI/BaseAI.cs
index 889a8372a..2f7298e1a 100644
--- a/Scripts/Mobiles/AI/BaseAI.cs
+++ b/Scripts/Mobiles/AI/BaseAI.cs
@@ -45,7 +45,7 @@ namespace Server.Mobiles
 	{
 		public Timer m_Timer;
 		protected ActionType m_Action;
-		private DateTime m_NextStopGuard;
+		private int m_NextStopGuard;
 
 		public BaseCreature m_Mobile;
 
@@ -830,7 +830,7 @@ namespace Server.Mobiles
 					m_Mobile.FocusMob = null;
 					m_Mobile.Combatant = null;
 					m_Mobile.CurrentSpeed = m_Mobile.ActiveSpeed;
-					m_NextStopGuard = DateTime.UtcNow + TimeSpan.FromSeconds(10);
+					m_NextStopGuard = Core.TickCount + (int)TimeSpan.FromSeconds(10).TotalMilliseconds;
 					m_Mobile.CurrentSpeed = m_Mobile.ActiveSpeed;
 					break;
 
@@ -928,7 +928,7 @@ namespace Server.Mobiles
 			{
 				m_Mobile.DebugSay("Praise the shepherd!");
 			}
-			else if (DateTime.UtcNow < m_NextStopGuard)
+			else if (Core.TickCount - m_NextStopGuard < 0)
 			{
 				m_Mobile.DebugSay("I am on guard");
 				//m_Mobile.Turn( Utility.Random(0, 2) - 1 );
@@ -2718,7 +2718,7 @@ namespace Server.Mobiles
 			m_Timer.Start();
 		}
 
-		private DateTime m_NextDetectHidden;
+		private int m_NextDetectHidden;
 
 		public virtual bool CanDetectHidden { get { return m_Mobile.Skills[SkillName.DetectHidden].Value > 0; } }
 
@@ -2734,7 +2734,7 @@ namespace Server.Mobiles
 			{
 				m_Owner = owner;
 
-				m_Owner.m_NextDetectHidden = DateTime.UtcNow;
+				m_Owner.m_NextDetectHidden = Core.TickCount;
 
 				Priority = TimerPriority.FiftyMS;
 			}
@@ -2802,7 +2802,7 @@ namespace Server.Mobiles
 					}
 				}
 
-				if (m_Owner.CanDetectHidden && DateTime.UtcNow > m_Owner.m_NextDetectHidden)
+				if (m_Owner.CanDetectHidden && Core.TickCount - m_Owner.m_NextDetectHidden >= 0)
 				{
 					m_Owner.DetectHidden();
 
@@ -2815,7 +2815,7 @@ namespace Server.Mobiles
 					int min = delay * (9 / 10); // 13s at 1000 int, 33s at 400 int, 54s at <250 int
 					int max = delay * (10 / 9); // 16s at 1000 int, 41s at 400 int, 66s at <250 int
 
-					m_Owner.m_NextDetectHidden = DateTime.UtcNow + TimeSpan.FromSeconds(Utility.RandomMinMax(min, max));
+					m_Owner.m_NextDetectHidden = Core.TickCount + (int)TimeSpan.FromSeconds(Utility.RandomMinMax(min, max)).TotalMilliseconds;
 				}
 			}
 		}
diff --git a/Scripts/Mobiles/AI/MageAI.cs b/Scripts/Mobiles/AI/MageAI.cs
index 7fee5549f..14dc3c651 100644
--- a/Scripts/Mobiles/AI/MageAI.cs
+++ b/Scripts/Mobiles/AI/MageAI.cs
@@ -15,8 +15,8 @@ namespace Server.Mobiles
 {
 	public class MageAI : BaseAI
 	{
-		private DateTime m_NextCastTime;
-		private DateTime m_NextHealTime;
+		private int m_NextCastTime;
+		private int m_NextHealTime;
 
 		public MageAI( BaseCreature m )
 			: base( m )
@@ -61,7 +61,7 @@ namespace Server.Mobiles
 
 				m_Mobile.Combatant = m_Mobile.FocusMob;
 				Action = ActionType.Combat;
-				m_NextCastTime = DateTime.UtcNow;
+				m_NextCastTime = Core.TickCount;
 			}
 			else if( SmartAI && m_Mobile.Mana < m_Mobile.ManaMax && !m_Mobile.Meditating )
 			{
@@ -101,7 +101,7 @@ namespace Server.Mobiles
 
 			if( m_Mobile.Controlled )
 			{
-				if( DateTime.UtcNow < m_NextHealTime )
+				if (Core.TickCount - m_NextHealTime < 0)
 					return null;
 			}
 
@@ -144,7 +144,7 @@ namespace Server.Mobiles
 			else
 				delay = Math.Sqrt( 600 - m_Mobile.Int );
 
-			m_NextHealTime = DateTime.UtcNow + TimeSpan.FromSeconds( delay );
+			m_NextHealTime = Core.TickCount + (int)TimeSpan.FromSeconds(delay).TotalMilliseconds;
 
 			return spell;
 		}
@@ -664,7 +664,7 @@ namespace Server.Mobiles
 				}
 			}
 
-			if( m_Mobile.Spell == null && DateTime.UtcNow > m_NextCastTime && m_Mobile.InRange( c, Core.ML ? 10 : 12 ) )
+			if (m_Mobile.Spell == null && Core.TickCount - m_NextCastTime >= 0 && m_Mobile.InRange(c, Core.ML ? 10 : 12))
 			{
 				// We are ready to cast a spell
 
@@ -714,7 +714,7 @@ namespace Server.Mobiles
 				if( spell != null )
 					spell.Cast();
 
-				m_NextCastTime = DateTime.UtcNow + GetDelay( spell );
+				m_NextCastTime = Core.TickCount + (int)GetDelay(spell).TotalMilliseconds;
 			}
 			else if( m_Mobile.Spell == null || !m_Mobile.Spell.IsCasting )
 			{
@@ -739,7 +739,7 @@ namespace Server.Mobiles
 				{
 					m_LastTarget = null;
 				}
-				else if( m_Mobile.Spell == null && DateTime.UtcNow > m_NextCastTime )
+				else if( m_Mobile.Spell == null && Core.TickCount - m_NextCastTime >= 0 )
 				{
 					m_Mobile.DebugSay( "I am going to reveal my last target" );
 
@@ -749,7 +749,7 @@ namespace Server.Mobiles
 					if( spell.Cast() )
 						m_LastTarget = null; // only do it once
 
-					m_NextCastTime = DateTime.UtcNow + GetDelay( spell );
+					m_NextCastTime = Core.TickCount + (int)GetDelay(spell).TotalMilliseconds;
 				}
 			}
 
diff --git a/Scripts/Mobiles/BaseCreature.cs b/Scripts/Mobiles/BaseCreature.cs
index f6660c43f..57e91dc77 100644
--- a/Scripts/Mobiles/BaseCreature.cs
+++ b/Scripts/Mobiles/BaseCreature.cs
@@ -616,7 +616,7 @@ namespace Server.Mobiles
 		public virtual bool DisplayWeight{ get{ return Backpack is StrongBackpack; } }
 
 		#region Breath ability, like dragon fire breath
-		private DateTime m_NextBreathTime;
+		private int m_NextBreathTime;
 
 		// Must be overriden in subclass to enable
 		public virtual bool HasBreath{ get{ return false; } }
@@ -5152,7 +5152,7 @@ namespace Server.Mobiles
 		private const double MinutesToNextChanceMin = 0.25;
 		private const double MinutesToNextChanceMax = 0.75;
 
-		private DateTime m_NextRummageTime;
+		private int m_NextRummageTime;
 
 		public virtual bool CanBreath { get { return HasBreath && !Summoned; } }
 		public virtual bool IsDispellable { get { return Summoned && !IsAnimatedDead; } }
@@ -5174,8 +5174,8 @@ namespace Server.Mobiles
 		public virtual double HealOwnerInterval { get { return 30.0; } }
 		public virtual bool HealOwnerFully { get { return false; } }
 
-		private DateTime m_NextHealTime = DateTime.UtcNow;
-		private DateTime m_NextHealOwnerTime = DateTime.UtcNow;
+		private int m_NextHealTime = Core.TickCount;
+		private int m_NextHealOwnerTime = Core.TickCount;
 		private Timer m_HealTimer = null;
 
 		public bool IsHealing { get { return ( m_HealTimer != null ); } }
@@ -5292,7 +5292,7 @@ namespace Server.Mobiles
 		#endregion
 
 		#region Damaging Aura
-		private DateTime m_NextAura;
+		private int m_NextAura;
 
 		public virtual bool HasAura { get { return false; } }
 		public virtual TimeSpan AuraInterval { get { return TimeSpan.FromSeconds( 5 ); } }
@@ -5345,7 +5345,9 @@ namespace Server.Mobiles
 
 		public virtual void OnThink()
 		{
-			if ( EnableRummaging && CanRummageCorpses && !Summoned && !Controlled && DateTime.UtcNow >= m_NextRummageTime )
+			int tc = Core.TickCount;
+
+			if ( EnableRummaging && CanRummageCorpses && !Summoned && !Controlled && tc - m_NextRummageTime >= 0 )
 			{
 				double min, max;
 
@@ -5361,21 +5363,21 @@ namespace Server.Mobiles
 				}
 
 				double delay = min + (Utility.RandomDouble() * (max - min));
-				m_NextRummageTime = DateTime.UtcNow + TimeSpan.FromMinutes( delay );
+				m_NextRummageTime = tc + (int)TimeSpan.FromMinutes(delay).TotalMilliseconds;
 			}
 
-			if ( CanBreath && DateTime.UtcNow >= m_NextBreathTime ) // tested: controlled dragons do breath fire, what about summoned skeletal dragons?
+			if ( CanBreath && tc - m_NextBreathTime >= 0 ) // tested: controlled dragons do breath fire, what about summoned skeletal dragons?
 			{
 				Mobile target = this.Combatant;
 
 				if( target != null && target.Alive && !target.IsDeadBondedPet && CanBeHarmful( target ) && target.Map == this.Map && !IsDeadBondedPet && target.InRange( this, BreathRange ) && InLOS( target ) && !BardPacified )
 				{
-					if( ( DateTime.UtcNow - m_NextBreathTime ) < TimeSpan.FromSeconds( 30 ) && Utility.RandomBool() )
+					if( ( Core.TickCount - m_NextBreathTime ) < 30000 && Utility.RandomBool() )
 					{
 						BreathStart( target );
 					}
 
-					m_NextBreathTime = DateTime.UtcNow + TimeSpan.FromSeconds( BreathMinDelay + ( ( Utility.RandomDouble( ) * ( BreathMaxDelay - BreathMinDelay ) ) ) );
+					m_NextBreathTime = tc + (int)TimeSpan.FromSeconds( BreathMinDelay + ( ( Utility.RandomDouble( ) * ( BreathMaxDelay - BreathMinDelay ) ) ) ).TotalMilliseconds;
 				}
 			}
 
@@ -5383,17 +5385,17 @@ namespace Server.Mobiles
 			{
 				Mobile owner = this.ControlMaster;
 
-				if ( owner != null && CanHealOwner && DateTime.UtcNow >= m_NextHealOwnerTime && CanBeBeneficial( owner, true, true ) && owner.Map == this.Map && InRange( owner, HealStartRange ) && InLOS( owner ) && owner.Hits < HealOwnerTrigger * owner.HitsMax )
+				if ( owner != null && CanHealOwner && tc - m_NextHealOwnerTime >= 0 && CanBeBeneficial( owner, true, true ) && owner.Map == this.Map && InRange( owner, HealStartRange ) && InLOS( owner ) && owner.Hits < HealOwnerTrigger * owner.HitsMax )
 				{
 					HealStart( owner );
 
-					m_NextHealOwnerTime = DateTime.UtcNow + TimeSpan.FromSeconds( HealOwnerInterval );
+					m_NextHealOwnerTime = tc + (int)TimeSpan.FromSeconds( HealOwnerInterval ).TotalMilliseconds;
 				}
-				else if ( CanHeal && DateTime.UtcNow >= m_NextHealTime && CanBeBeneficial( this ) && ( Hits < HealTrigger * HitsMax || Poisoned ) )
+				else if ( CanHeal && tc - m_NextHealTime >= 0 && CanBeBeneficial( this ) && ( Hits < HealTrigger * HitsMax || Poisoned ) )
 				{
 					HealStart( this );
 
-					m_NextHealTime = DateTime.UtcNow + TimeSpan.FromSeconds( HealInterval );
+					m_NextHealTime = tc + (int)TimeSpan.FromSeconds( HealInterval ).TotalMilliseconds;
 				}
 			}
 
@@ -5416,10 +5418,10 @@ namespace Server.Mobiles
 				m_FailedReturnHome = 0;
 			}
 
-			if ( HasAura && DateTime.UtcNow >= m_NextAura )
+			if ( HasAura && tc - m_NextAura >= 0 )
 			{
 				AuraDamage();
-				m_NextAura = DateTime.UtcNow + AuraInterval;
+				m_NextAura = tc + (int)AuraInterval.TotalMilliseconds;
 			}
 		}