Land Forces

Twenty full Assault Divisions would be raised, of these:
Fifteen from the Human Population of the Sector, mostly raised from humans from the Sector (ideally vets) but with essentially any human allowed to enlist. These would be mixed role divisions comprised of Infantry Brigades with significant support elements. Eight of these would be equipped with new Planetary Defense Force Armour.
Two from Murkhana, mostly Koorivar Fusiliers veterans out of work or in low paid jobs. These divisions would be primarily defensive units with a great deal of artillery and heavy armour, the Combat Engineering Regiments would be drawn from these too.
Three from recruitment of dispossessed ethnic Tionese across the galaxy, whipped up into a fierce hatred of those who killed their blood kin. These would include Caluulans, Embarilites and those from across Allied Tion and the Tion Hegemony, as well as refugees from the Cronese Mandate.

This would mostly be "for show" as we pretty rarely see ground combat in any major role, essentially I'd just like to bandy around the "Twenty Divisions of beings are under arms ready to.." blah blah etc. But if there is a counter-offensive, then I'd like to be ready to repel it. Each unit would have a number of armoured units, with some being Light Divisions mostly of dismounted Infantry but some also being heavier with significant armour, the Armour would be a mix of CIS Droid Tanks and Walkers (operated by remote control in many cases as it takes a while to over-ride the shut down code) as well as surplus Clone Wars era stuff. Regiments would be equipped roughly as homogenously as possible but especially in the Alien and Foreign Partisan troops, this often was not possible.

There would also be several less well equipped (usually just with old Battle droid E5 Blaster rifle with maybe a clip or two of spare gas and power packs) Divisions of "Planetary Guard" who would be old men, young men and the disabled, with few vehicles except converted civilian ones and the occasional CIS tank recovered from a scrap yard.

Emplacements

All big cities on the Auril Sector worlds would have bulwarks and entrenchments made about the, supplemented by a few emplacement e-webs and light turrets a la hoth.

Murkhana Defenses
The Murkhana Orbital Minefield - Mine Type B (100) scattered at random points in high orbit at locations only known by ground control. Only 10 at the most could ever target a ship approaching from a given angle.
Theater Shield over Murkhana City
V-180 Planetary Ion Cannon - In a fort outside of Murkhana City on the shores of Murkhana bay, outside the Theater shield perimeter on a hilltop, linked to the city central power grid by underground cables deep in the bedrock. The fort has several E-Web and SAM emplacements.

Ossus Defense Array
HVS 2 Hypervelocity Cannon - Noted as vulnerable when it fires as it drops shields - another logical target for commandos.

Weakness: Murkhana's orbital defense weapon is vulnerable to attack. Infiltration and destruction of two of the three main power plants within Murkhana City will cause the power level to drop so that only the shield or Ion Cannon can be powered, destruction of the third would mean both would be inactive. Again, commando raids, infiltration or black ops to sever the links or disable the plants would take down the defense grid.

Nespis VIII Defense Complex
Defensive Silo Array 1 (A PY-6 Proton Torpedo Site ) 100km south of Nespis VII's ground capital, positioned so as to be able to cover the space about "Space City" with it's 50 Proton Torpedo tubes, with a magazine of 500 torpedoes total held below ground. Naturally these silos are vulnerable to orbital or fighter strikes. It would be protected by two Air Defense Towers and a shield generator over the tubes which has to be deactivated prior to firing discouraging attack by fighters except in large numbers - this creates a good opportunity for a "commando assault" as the silo is up in the mountains and while the Silos themselves are difficult to breach by small teams, the outlying generator and towers could easily be knocked out if you could place detonation packs in them.

Within Space City itself there would be a dozen experimental V-200 Ion Cannon Turrets mounted on Military structures. (Since they're there canonically)

Cron Drift Research and Repair Station (Might as well have a big target sign painted on it) - I designed this pretty much so it can be raided, sliced or attacked by the enemy.

In the Cron Drift there would be a Telgorn Dockyard, protected by four Gun Emplacements, in the computer on the Repair Yard there would be information about the upcoming invasion, as well as troop recruitment numbers and other useful secrets I'll share when someone captures them.
There would also be an Asteroid Hangar some distance away, concealed in a larger asteroid. Inside, as well as a large number of Interceptors, would be a prototype Rothana Fighter/Bomber which has been lent for testing - some of the technologies on it not yet patented, this presents the chance to capture and reverse engineer an extremely slick craft.

Home Defense Starfighter Corps
To each world in the Auril Sector - twenty four Mankvim-814 Light Interceptors, old and fragile when its shields go down, with an incredibly short range, these fighters never the less are extremely fast and efficient in atmosphere and low orbit for engaging threats. They're essentially being purchased because they're about the cheapest manned fighter you can buy anywhere.

Weakness: An old fighter, incapable of travelling more than an hour away from it's home base meaning that it can't reach other planets in the same system (unless theyre very close) without refueling in flight. In combat they're actually not bad but lack anti-capital ship firepower or real staying power to engage in long lasting dogfights without risking running out of fuel.

Strike Force One
Four Colony-class Fast Pickets - To launch raids on Lorrdian shipping and allies.
Two Nexu-class Strike Corvettes - As above, and to hit ground targets. Note that only one will be mothballed
Plus the DP20 currently serving.

The Invasion Fleet
Rothana-class Light Destroyer
One Pelta-class Frigate (turbolasers removed) - Fleet Medical Frigate and Humanitarian Vessel
Three Strike-class Cruisers - Note: One will not be mothballed.
One Dreadnaught-class Heavy Cruiser
Ten Harmonius-class Armed and Armoured Freighters (Passenger variant, able to carry one Regiment each) - Slow, vulnerable and incredibly vulnerable to Capital ship fire, affixed by umbilical tethers would be a suitable number of dropships to disembark these men quickly.
Two Giga-class MegaTransports - Unarmed, slow and ponderous at 20MGLT, these carry whole Divisions aboard and so require the whole invasion force to move in a sublight convoy to protect the vulnerable commandeered liners.
Four Hardcell-class Transports - To lead the first wave, Hardcells are intended to land Tanks and Shocktroops to start the blitzkrieg and secure the landing area.

Retired forces

The Bayonet-class would sold to the Imperial Sector Navy and mothballed. The Guard-class would be landed on Ossus at the Auril Sector Irregular Militia Headquarters, its engines would be removed but its weapons left in place. It would serve as a monument and also a defensive weapons platform perched on the high jutting peak on which the Militia HQ is located - a symbol of Tionese Defiance, the ship would notionally be repairable but would become largely a tourist attraction.

Note
This force is a "one-off" representation of an alliance comprising most of a Sector gearing up for war and preparing to launch an invasion of a world. Ships highlighted in orange will be mothballed and withdrawn from active service at the end of the conflict or six months expires (whichever is longer). I have roleplayed out borrowing and mortgaging worlds and assets in order to get the quick cash needed to deploy this fleet - mostly these are common ships but the Rothana ones are largely "showroom models" bought because they were immediately available.

The idea is rather like the British Navy has always done throughout history, it keeps a small number of active ships in peacetime but has others mothballed which can be brought back to service in some months notice. I propose that the Dreadnaught and one of the Strike-class ships were already mothballed and will be brought back to properly usable conditions over the coming days and weeks. Aside from this these are all new purchases or commandeered ships. The Hardcells and Gigas are commandeered and will be demobilized after the war, the Harmonious class vessels will be mothballed and sold off at a low price after the conflict.

It's difficult to comprehend in a modern world where we're used to the idea of standing large navies, but I don't think that even a prosperous Outer Rim sector such as the Auril Sector can afford to be running large armies.

So after six months (unless the war goes on and on), the active fleet of the combined worlds in the Auril Sector will be:
Rothana-class Light Destroyer (1) - While officially kept on the books, it would be officially open for bidding once conflict ended.
DP20 Gunship (1)
Strike-class Cruiser (1)
Nexu-class Gunship (1)
Colony-class (4 - not truly capital ships anyway, big fast shuttles)

The other ships would be demobilized and stored at the Imperial Sector Capital Docks, under their care and for their use; although the Auril Sector Worlds can call for them to return to service again if required (would need another request). At wars end the ground army would be returned to it's respective worlds, paid off and de-mobbed. Eight divisions would remain the notional remaining strength, but many of these would be reserves.