Thanks for the advice! Due to my opponent making some pretty bad tactical decisions I almost failed to leave him enough firepower to kill my army!
My army:
HQ - two big mechs both with 3 grot oilers. 1 of them also had da fixer upper and a mega force field. These were in the Stompa
Troops - 3 unupgraded squads of Grechin deployed in concentric semicircles around the Stompa.
Elites: 2 squads of Burna boyz each with 3 mechs with grot Oilers and 2 Burna boyz
Heavy Support: Deff Dread with 2 Custom Mega Blasters and extra armour
Lord of War: 1 fully upgraded BuzzGob's Big Mech Stompa. Deployed on the table edge.
His army:
HQ: Farseer.
Troops: 1 squad of 8 scatter laser jet bikes with a warlock and singing spear
Elites: 10 wraithguard.
Allied detachment:
HQ: Archeon with Webway portle
Troops: Kalbite Warriors, base squad.
Pre-game: I won the role of and chose to go second.
Turn 1:
Movement: He moved his whole army straight towards mine.
Psychic: Nothing of note. I got lucky on denial and he got unlucky
Shooting: Wraithknight shot at Stompa. Missed one shot and rolled a 1 on the other. Jetbikes shot at Stompa stripping it of its 4 energy shields.
Movement: Smelling blood, my Stompa moves 12 inches forward straight at the jetbikes, scattering Grechin as it goes. It then unleashes a storm of firepower, killing two Kalbite warriors and stripping 2 wounds of the Wraithknight with Deff Cannons and Supa-rokkits. It also scratches some Windriders' paintwork.
Assault: This is were the tide of battle starts to turn in my favour. The Stompa crashes into close combat with the Jetbikes and kills one off, now being locked in combat and immune from shooting. The Warlock's singing spear can damage me on a roll of double 5 or above, preventing my opponent from invoking the Our Weapons Are Useless special rule.
Turn 2:
Movement: The enemy moves up again. Wraithguard deepstrike.
Psychic: Nothing of note.
Shooting: The wraithknight takes 2 hullpoints off the Death Dread.
Assault: Another bike dies.
Movement: Grechin move forward along with the Death Dread
Shooting: Grechin shoot at Wraithguard doing nothing.
Assault: Death Dread charges into combat, leaving 4 bikes including the warlock alive.
Turn 3:
Movement: Wraithguard move towards Grechin
Psychic: Nothing of note. I roll 3 6s with 4 dice on denial!
Shooting: Wraithguard are forced to utterly annihilate some very unlucky Grechin, killing 5.
Assault: All remaining bikes killed, freeing Stompa from Close Combat.
Movement: Grechin move up.
Shooting: A single Deff Cannon shot kills off all but 2 Wraithguard and fails to wound the Archeon. Another brings the Wraithknight down to 3 Wounds. Grechin kill 2 more Kalbite Warriors.
Opponent tries to concedes due to time limitations, but I let him shoot his two remaining Wraithguard (62 points) at me which get lucky and blow up the Stompa (600 points)... If I had been trying to win I would have charged them, but I was not.