First I would like to suggest that is bit dangerous create a new army when you go to Tournaments. No matter how good we tailor the army here, if someone doesn't have experience with this army (and I mean months of using it) he will lose from the early start. It's better to field an army someone play for month/years and feel confident with it, than start from scratch.
HQ : It's main purpose should be LD cover. Drop the excessive equipment.
(Carapace x2, Shield, Power Fist, Storm Bolter, Power weapon) and the meltagun.
Keep the Commissars Bolter (for the sake of 1p) and give one to the Commander too.
Use JO+Honorifica it will save 5p from there too. Get 2 Flamers, Standard & Master Vox. (LD10 is must).
HQ 150p -27p
StormTroopers : Drop Flamer & GL. Get 2 Plasma & 1 Vox.
StormTroopers 125p +11p
Chimera : As mentioned get the Multilaser. But I believe is bit expensive with those upgrades. 100p
Hellhound : Hmm, Smoke Launcher is must here. Regarding the other upgrades 15p at 1850 can be forgiven. +3p
LMBTs : Drop the Lascanons. Battle cannon should always hit. Get HB insteed. -20p
Infantry :
1st HQ : Drop Commissar. Get 2 more flamers & Vox. Cost 69p now (-43p).
2nd HQ : Drop Commissar. Drop the GL too, get 3 flamers, Vox & Power weapon for the JO (and bolter to stop crying because the other one has). Cost 69p (-25p).
Their use as you may imagine is "cover holes" in CC
Squads.
a) Move 1 Lascanon Squad to the 1st Platoon & 1 HB on it's place.
b) Even if Missile Launcher in theory is OK in practice the more you hit the better. Replace it with Autocannon.
c) Drop the Vet Serg in all the squads. Get Serg with Lasgun & Vox Caster. Total -9p
d) On the 2 HB & 2 AC (or ML) squads the Assault weapon should be GL. Flamer isn't that good with Heavy weapons. On the other Hand your 2 AT Squads need PlasmaGuns. That will cost you +10p more.
Up to now we have already save 100p. Have LD10 army with hard hitting Squads & HQs.
We have Ratlings & Sentinels to sort out.
Sentinels, cost 55p each for AV10 open topped unit. They will attract fire power like anything else. (Easier to die than the Lascanon squads). Drop 1 of them & replace the other 2 with Multilaser or Autocannon. Ofc keep them in Separate units.
That will leave 165 - 175p.
Now there are the "Normal" way and the "Cheesy" way to spend the points.
Normal = 2 more squads with AC, GL & Vox.
Cheesy = drop the track guards from the Chimera. And place a Demolisher with Lascanon & Plasma Cannons sponsors.
He he, I would like to see opponents faces when your friend field 3 Heavy Tanks, Hellhound (a class on it's own), Chimera & 2 Walkers. And LD10 army.