So here's a proposed Salvar Chem Dogs army. This would be a themed army for friendly / campaign play. I would like for the themed part of the list to be competitive however, because campaign games aren't fun to lose either

The main idea of the army would be a PDF style force, tasked with putting down urban insurrection and mini-revolutions all over the troubled Savlar system. The result is a sort of blob/mech hybrid that looks to maximize volume of fire and mobility, but also offer ground pounding stability with plenty of guardsmen forming the foundation. If I took it to a tournament, I would bring an alternate list and basically run leafblower. Here's what I've got so far.
4th Savlar Chem Dogs Mobile Urban Suppression Unit
HQ
Company Command Squad /w Company Commander, Veteran Lascannon Team @70p
Fast
Bane Wolf Squadron /w 2x Bane Wolf Assault Vehicle @260p
Vendetta Gunship "Overlord 00" /w 3x Twin Linked Lascannons @130p
Vendetta Gunship "Overlord 01" /w 3x Twin Linked Lascannons @130p
Troops
Echo Platoon @320p
1x
PCS /w Platoon Commander, 4x Meltaguns in Chimera /w Multilaser, Heavy Bolter
2x Infantry Squad /w Autocannon Team
1x Heavy Weapons Team /w 3x Autocannon
Oscar Platoon Platoon @320p
1x
PCS /w Platoon Commander, 4x Meltaguns in Chimera /w Multilaser, Heavy Bolter
2x Infantry Squad /w Autocannon Team
1x Heavy Weapons Team /w 3x Autocannon
Veteran Squad Romeo /w 3x Meltgun in Chimera /w Multilaser, Heavy Bolter
Veteran Squad Zulu /w 3x Meltgun in Chimera /w Multilaser, Heavy Bolter
Heavy Support
Leman Russ Executioner /w 2x Plasma Cannon Sponsons @230p
Leman Russ Executioner /w 2x Plasma Cannon Sponsons @230p
Weapon Summary:
Melta Guns - 14
Autocannons - 8
Twin Linked Lascannons - 6
Plasma Cannons - 6
Chem Cannons - 2
Lascannons - 1
Composition.
8x AV12: Chimera x6, Vendetta x2
2x AV14:
LR:E x2
30x Mounted Close Range Infantry /w 14 Special Weapons
52x Ground Troops /w 9 Heavy Weapons
I think that's a fairly good, fluffy blend of mobilized and ground forces, with a slight emphasis on urban combat.