Waaaaaaaaaaay too much anti-tank. I know 30k has a lot of armor, but I think you surpassed your need at the expense of your other needs. The Quad Mortars all have Shatter shells, which will deliver some hurt to pretty much anything that isn't Flare Shielded AV14. One Valdor is usually enough, since it will be gunning for nasty enemy super-heavies and not much else.
The Leman Russ, honestly, isn't worth it. I would scrap them for Dracosans and some Veletaris squads to give you mobility. Right now, your scoring units are stuck behind
ADLs and can't reliably or easily relocate to a far away objective.
I love the Infernus - that is a good call. Much needed unit to help erase threatening Marine blobs.
How about something like this:
HQ:
Lord Marshal
Paragon Blade, Digital Lasers, Grav-Wave Generator, Artificer armor, Iron Halo, Cyber-Familiar, Volkite Serpenta
[165]
Pick one:
Uncanny Survivor
Blind Barrage
Tank Commander
[55]
Elites:
(2) Quad Mortars
[140]
(2) Quad Mortars
[140]
(2) Quad Mortars
[140]
(3) Medicae Detachment
[60]
Troops:
Infantry Tercio (Orderly)
Lasrifle section
[100]
Infantry Tercio (Orderly)
Lasrifle section
[100]
Aegis Defense Line
Quad Gun
[90]
Aegis Defense Line
Quad Gun
[90]
Infantry Tercio
Veletaris Storm Section
Meltabombs
[120]
Veletaris Storm Section
Meltabombs
[120]
Veletaris Storm Section
Meltabombs
[120]
Dracosan Armored Transport
Flare Shield, Armored Ceramite, Demolisher Cannon
[210]
Dracosan Armored Transport
Flare Shield, Armored Ceramite, Demolisher Cannon
[210]
Dracosan Armored Transport (
LC, Orderly)
Flare Shield, Armored Ceramite
[180]
Heavy:
Malcador Infernus
Lascannon, Armored Ceramite, Chemical Ammo
[330]
Valdor Tank Hunter
Armored Ceramite
[320]
Malcador
Battlecannon, Demolisher Cannon, Flare Shield, Armored Ceramite
[310]
[3000]
EDIT: Revised because rules and stuff.