Was playing around with Tabletop Admiral and this is what I came up with for a Imperial list.

800 Points.

Vader 200

Saber throw 10

Battle Meditation 10

Force reflexes 15

74-Z Speeder bikes 90

Long range comlink 10

AT-ST 195

General Weiss 10

88 Twin Light Blaster Cannon 20

AT-ST Mortar Launcher 10

Long Range Comlink 10

Stormtroopers 44

DLT-19 Trooper 24

Stormtrooper 11

Targeting Scopes 6

Stormtroopers 44

HH-12 Trooper 34

Stormtrooper 11

Targeting Scopes 6

Snowtroopers 40

Stormies don't benefits from scopes much at all. They already have a few re-rolls with a aim action and precise rule so the chances of needing another isn't a priority for points. Also if some troopers die the chances of needing the scopes drops even more. Thats 12 points found.

AtSt is paying 20 or 30 points to fire 3 guns every second turn thanks to Weiss being exhaust. I would drop him and either the mortar or cannon. Lets say mortar, thats 20 points found.

Vader and your units both have abilites to give or receive orders over long distances. Generally your models aren't going to be so spread out you need all 3 at once Lets just drop 1 so thats 10 points.

Now we have found 42 points and found ourselves a 4th infantry squad.

With Battle Meditation the long range comlinks are of little use. I'm also skeptical of Weiss- He's impressive when he gets all four guns, but that requires the enemy to be at multiple range bands. I would cut him, and either go with just the blaster cannon, or mortar+grenade launcher (since they function at different ranges). Keep in mind that firing the grenade launcher in the same pool as your main gun means the entire pool ignores cover! I also have to second cutting targeting scopes; without the rocket launcher you don't roll enough dice. That gives you enough points to add another squad of snowtroopers.

You might want to switch the hh-12 to another dlt-19 as well, at least until Veers comes out and you have more action economy to support exhaustable weapons. If you do, you can give impact grenades to two of your corps units, which might be a more practical anti-armor solution for the moment anyway.

take jammers instead of comlink or swap battle meditation for force push to bring enemy units closer to vader. also weiss isnt worth it unless you put all the guns on the AT-ST as it already has arsenal 2.

HH-12 is near useless in the current game unless youre in a mirror match with an AT-ST, Requiring a ready to fire seriously hampers it as you almost always want to have aim when you fire it. means you're only gonna fire it 2-3 times agame untill we get veers.