Chaos and Orks vs Tyranids and Astra Militarum

My wife and I join forces to battle some friends. She made me proud!

Mission : Maelstorm of War - Spoils of War
Deployment: Hammer and Anvil
Points limit: 2000
Lists:

Khorne Daemonkin:
Formation Detachment:

•  Heralds Anarchic
• 5 x Herald of Tzeentch, Psyker Level 1, 1 x Paradox

Unbound Army

•  Khorne Tower of Skulls

Orks:
Combined Arms Detachment:

• Big Mek equipped with 'Eavy Armour, 3x Ammo Runt, Bosspole, Choppa, Gitfinda, Shokk Attack Gun
• Painboy equipped with Bosspole, Warlord
• 12-man Burna Boyz riding in a Trukk
• 10-man Boyz
• 10-man Gretchin with Runtherd
• 2 x 4-man Deffkoptas equipped with Twin-linked Rokkit Launcha
• 15-man Lootas
• Aegis Defense Line with Ammunition Dump

Astra Militarum:
Combined Arms Detachment:

•  Tank Commander
•  Battle Tank equipped with Battle Cannon, Camo Netting, Heavy Bolter
•  Command Punisher equipped with Camo Netting, Lascannon, Turret-mounted Punisher Gatling Cannon
• Tank Commander
• 2 x 10-man Veterans equipped with Grenadier, 3 x Meltagun ridding in Chimera
• Vendetta equipped with 3 x  Twin-linked Lascannon
• 2 x Wyvern

Tyranids:
Combined Arms Detachment:

• Hive Tyrant equipped with Desiccator Larvae, Powers of the Hive Mind, Psyker (Mastery Level 2), 2 x Twin-linked Devourer with Brainleech Worms, Wings
• Malanthrope 
• Zoanthrope Brood
•  Neurothrope 
• 2 x  Zoanthrope 
• 2 x 11-man Termagant 
• 3-man Biovore 
• Carnifex equipped with 2 x Twin-linked Devourer with Brainleech Worms
• Mawloc

Deployment:
Heralds and Lootas stand behind the Aegis defense line. Mawloc and Vendetta in reserves.

Chaos Orks Turn 1:
Tower of Skulls, Trukk and Deffkoptas advance the battlefield. Heralds cast Prescience on Lootas and Tower of Skulls but one suffers Perils of the warp and looses a wound. Lootas mange to exterminate the Zoanthrope Brood. The Tower manages to kill some Termagants, get 2 wounds of a Biovore and one wound on the Hive Tyrant.

Militarum Tyranids Turn 1:
Hive Tyrant takes to the skies and wrecks the Trukk. One Chimera cannot move due to a failed One eye open test. The other does a wound to one of the Deffkoptas.The Punisher kills one of the Deffkoptas on the right and the Battle Tank kills a couple of Boyz, which fail their moral and start to run back. Biovores manage to kill 3 Lootas. Wyverns shoot at the Heralds but they manage to survive.

Chaos Orks Turn 2:
Deffkoptas move closer to the Chimera and get of a hull point and shakes the crew. The other Deffkoptas tried to get in range of the Wyverns so they turbo-boosted over the tank squad. Tower of Skulls took out the Carnifex. Lootas get blessed with prescience and get 2 wounds on the Hive Tyrant which looses his balance and falls flat on his face and guts splattered all across the battlefield.
(forgot to take photo)

Militarum Tyranids Turn 2:
Vendetta flies over the field shoots at the Tower and fails to get the target. All Veterans from the Chimeras shoot their meltaguns but they also fail to penetrate the thick armor. A Mawloc appears from the ground and swallows a couple of Lootas, then it returns to the deeps since he mishaps. Wyverns and Batle Tank manage to kill all the Lootas, some Boyz, the Painboy and the Big Mek. Biovores flatten some of the Burnas. Pask kills 2 jinking Deffkoptas.

Chaos Orks Turn 3:
Tower of Skulls Thunderblitzed the Chimera but got only a hull point off. Deffkoptas get the job done for the Tower and wreck the tank and assaults the troops inside, killing a couple of them but their boiling blood won't let them flee the battle. Boyz regroup and move over the defense line to hold the objective. Burnas grab the objective in the middle. The other Deffkopta get 2 hull points of one of the Wyverns.

Militarum Tyranids Turn 3:
The Mawloc appears again and engulfs 3 Deffkoptas and a Veteran. It mishaps again but we get to place him. Veterans disembark and shoot at the Tower but their bullets have no penetration. Pask and the Battle Tank shoot at the Tower but the thing just would not die. Biovores and Wyverns manage to kill a Herald. Vendetta flied of the table. Termagants fail the charge on the Deffkopta. Veterans kill the Deffkopta in combat. (I took the photo before the combat)

Chaos Orks Turn 4:
Tower of Skulls kills one squad of Veterans, kills a few from the other and get 2 wounds on the Mawloc. Deffkopta wrecks the Wyvern.

Militarum Tyranids Turn 4:
Mawloc rolls a 1 on the One eye open, the wretched beast cannot do anything. Pask, Battle Tank, Veterans and Vendetta get 3 hull points of the Tower of Skulls. Termagants assault the Deffkoptaand get a hull point.

A this point our guests had to leave so we ended the game. The first 2 turns we did well, but from that point forward we got pounded really bad. Final score was Chaos Orks 11 - 5 Militarum Tyranids.