Imperial Guard Sergeants do cost 6 points, like every other Guardsmen. If he'd written '12' then it'd be a Vet Sergeant. Plus this list is a text summary from Army Builder, and it'd say 'Vet Sergeant'.
Ok, overall this is actually a very good list. It doesn't really need a lot of tweaking, and, in fact, you could take it against most people without tweaking it and still do pretty well.
Command Platoon (HQ) @ 336 Pts
3 Command Squad @ 56 Pts
Lasguns; Iron Discipline
1 Junior Officer
1 Veteran w/ Lasgun; Standard Bearer
You've got 58 points to play around with, so lets spent 25 of them on an Honorifica Imperialis. Might as well get the Ld9. No reason not to. You've also got a spare Doctrine Slot, so take Close Order Drill. It's free, so you don't lose anything by taking it, and you can rank your models up the turn before you are charged/charge into combat (assuming you have to charge because you can't get away in time), so that you can benefit from the I4 without having to have your models all bunched up from the start of the game.
6 Anti Tank Squad @ 95 Pts
Missile Launcher (x3); Lasguns
6 Fire Support Squad @ 90 Pts
Heavy Bolter (x3); Lasguns; SharpShooters
6 Fire Support Squad @ 95 Pts
Autocannon (x3); Lasguns
Mmm... Missile Launchers. Not good.
The Autocannons are better at cracking AV12 and below than ML's are, and Lascannons are better at killing AV13 and 14, and they hit just as often. You've got 33 points after buying the Honorifica, so use another 15 to make those ML's into Lascannons. 18 left!
Infantry Platoon (Troops) @ 439 Pts
4 Command Squad @ 154 Pts
Flamer (x4); Iron Discipline
1 Junior Officer w/ Close combat Weapon; Laspistol
1 Chimera @ 85 Pts
Multi-Laser; Hull Heavy Bolter
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
Infantry Platoon (Troops) @ 399 Pts
4 Command Squad @ 149 Pts
Flamer (x4); Iron Discipline
1 Junior Officer @ 40 Pts
1 Chimera @ 80 Pts
Multi-Laser
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
9 Infantry Squad @ 95 Pts
Lascannon; Lasguns; Plasma Gun
1 Sergeant w/ lasgun @ 6 Pts
About as standard as you can get. A good amount of infantry, 60, for an 1850 list. Two extra leadership bubbles, and a couple of light tanks! Nice.
5 Hardened Veterans (Elites) @ 83 Pts
Lasguns (x2); Plasma Guns (x3); Drop Trooper
1 Hardened Veteran Sergeant w/ Close combat Weapon; Laspistol @ 13 Pts
No need to take 6 of them. Having even numbers doesn't matter on suicide units. Save yourself the 8 points. That brings us to 26 points left.
5 Rough Riders (Fast Attack) @ 55 Pts
Hunting Lances
Even numbers will help this unit, not so much from a VP or scoring perspective, but because another 2 I5 S5 power weapon attacks on the charge is worth the extra 11 points. 15 left.
1 Leman Russ Battle Tank (Heavy Support) @ 145 Pts
Battle Cannon; Hull Heavy Bolter
1 Leman Russ Battle Tank (Heavy Support) @ 145 Pts
Battle Cannon; Hull Heavy Bolter
1 Leman Russ Demolisher (Heavy Support) @ 155 Pts
Demolisher Cannon; Hull Heavy Bolter
Fine, except you need Plasma Cannon Sponsons on that Demolisher so that it can do something interesting beyond 24". You have 15 points though. This isn't a problem. Ditch two flamers from each Platoon Command Section and you get 12 points back, giving you 27.
27 points gives you enough for the Plasma Cannons (20), Extra Armour on the Demolisher (5), and then two Searchlights on the Chimeras (2).
1850... or not... Did a quick calc, and you can have everything I just said for 1850 except the EA on the Demolisher.
Now, are there any alternatives?
Well, one thing you can do is make the third squad from each platoon into an HB/Flamer Squad. Straight away this gives you 38 points to play with. What can you do with 38 points? Easy!
- Spend 15 on Extra Armour for the three big tanks, 20 on giving the AT squad and other FS squad 'Sharpshooters, and the remaining 3 on Searchlights for the three big tanks.
- Ditch Sharpshooters (48 now) and take Light Infantry on all three Support Squads, giving you 18 to buy EA & Searchlights for the 3 big tanks.
- Get a flamer back in one Platoon Command Section (32 left), and upgrade the other Platoon Command Section to 4 Meltaguns (10 left), then buy Sharpshooters for the FS squad so the Autocannons can re-roll 1's.
Up to you though. There are lots of tweaks you could make, and entire revisions that involve ditching the Demolisher, the H-Vets, the Rough Riders, or any combination thereof to get more H-Vets/RR's or even more Chimeras (or a Hellhound). In fact, by dropping the Demolisher and the Rough Riders you can afford two Hellhounds with Smoke/EA/Pintle Stubbers and still keep the H-Vets (and you'll have 9 points to spare!).
BYE