Doctrines:
Carapace Armor
Grenadiers
Veterans

HQ: Command Squad-115
-Heroic Senior Officer
-Master Vox
-Carapace Armor

Troop: Grenadier Squad-231
-Veteran Sergeant
–Plasma Pistol
-Vox-Operator
-Meltagun
-Plasma Gun
-6x Grenadiers
-Chimera
–Autocannon
–Hull-Mounted Heavy Bolter

Troop: Grenadier Squad-221
-Veteran Sergeant
–Plasma Pistol
-Vox-Operator
-Meltagun
-Plasma Gun
-6x Grenadiers
-Chimera
–Autocannon
–Hull-Mounted Heavy Bolter

Elite: Hardened Veterans Squad-164
-Veteran Sergeant
–Plasma Pistol
-Lascannon
-2x Plasma Gun
-Meltagun
-Vox-Operator
-3x Veterans
-Carapace Armor

Elite: Hardened Veterans Squad-164
-Veteran Sergeant
–Plasma Pistol
-Lascannon
-2x Plasma Gun
-Meltagun
-Vox-Operator
-3x Veterans
-Carapace Armor

Heavy Support: Leman Russ Vanquisher-215
-Hull-Mounted Lascannon
-Extra Armor
-Hunter-Killer Missile
-Track Guards

Heavy Support: Leman Russ-180
-Hull-Mounted Lascannon
-Extra Armor
-Hunter-Killer Missile
-Track Guards

Heavy Support: Leman Russ-180
-Hull-Mounted Lascannon
-Extra Armor
-Hunter-Killer Missile
-Track Guards

This army is geared more towards fighting Space Marines and other 3+ saves, so I tried to stick in as many AP 1, 2 and 3 weapons as I could. I also wanted the amount of fire it could put out from everywhere to be crushing-basically enough to kill everything before it gets close.