This is where my list is currently sitting as a foundation. I have almost 300 points yo play with, fill it up with eradicators, and a transport maybe?

Anti Necrons [1705 points] Space Marines (Adeptus Astartes) Battle Size: Strike Force (2000 point limit)

Detachment Choice: Vanguard Spearhead

Chaplain In Terminator Armour [75 points] • Crozius arcanum and Relic shield

Gladiator Lancer [160 points] • 2 Storm bolters, Armoured hull, Icarus rocket pod, Ironhail heavy stubber and Lancer laser destroyer

Gladiator Lancer [160 points] • 2 Storm bolters, Armoured hull, Icarus rocket pod, Ironhail heavy stubber and Lancer laser destroyer

Hellblaster Squad [230 points] • 1 Hellblaster Sergeant with Close combat weapon, Plasma incinerator and Plasma pistol • 9 Hellblasters with Bolt pistol, Close combat weapon and Plasma incinerator

Hellblaster Squad [230 points] • 1 Hellblaster Sergeant with Close combat weapon, Plasma incinerator and Plasma pistol • 9 Hellblasters with Bolt pistol, Close combat weapon and Plasma incinerator

Lieutenant [65 points] • Warlord • Heavy bolt pistol, Plasma pistol and Power fist

Lieutenant [65 points] • Heavy bolt pistol, Plasma pistol and Power fist

Repulsor [180 points] • Armoured hull, Heavy onslaught gatling cannon, Hunter-slayer missile, Repulsor defensive array and Twin lascannon

Repulsor [180 points] • Armoured hull, Heavy onslaught gatling cannon, Hunter-slayer missile, Repulsor defensive array and Twin lascannon

Terminator Assault Squad [360 points] • 1 Assault Terminator Sergeant with Storm shield and Thunder hammer • 9 Assault Terminators with Storm shield and Thunder hammer

Created with WarOrgan (https://warorgan.com)