[Bremmer925]

First off, give all your officers bolt pistol and power weapon.You don't want your zeros smoked by their own weapon. You should also take all of the lasguns out of your HQ squads as it looks like you are planning to use them for your counter charge units. Give them pistol and close combat weapons so you can shoot then charge. Also give them frag grenades.
Have you considered taking 1 squad from each platoon to form an armored fist squad and a veteran squad. The stormtroopers would be a good support for your terminators if you give them deepstrike and the armored fist could support your Leman Russ. This would also give you additional units to take objectives. If you can, give the vets a lascannon and 3 plasma rifles or grenade launchers so you can try to infiltrate on an enemy's flank.
You NEED to give your vehicles smoke launchers and extra armor to improve their survivability.
I would also advise you to take heavy weapons in your line squads. Good combinations are rocket launcher/ grenade launcher or autocannon/ plasma rifle. They both give you a respectable AT ability if you need it ( especially against side armor) and a compliment to your lasguns against any infantry. The first option is good against horde armies and the second works well against high toughness ones. Lascannons are best in AT squads since the weapon costs the same as a squad weapon ( the rocket launcher costs 5 points more).
You can add a remnant squad to each platoon to act as a speed bump or as additional counter charge. Give them a flamer and a shotgun for the sergent, and put them ahead of your main line. The enemy will have to spend a turn shooting at them or you will block his charge on your line with it.
Sharpshooters can be good, but watch out for its cost. Usually it is best to use it in your supprt squads but not in the line units. You can also use it in your HQ squads to improne your close in shooting before you charge.
You have the doctrines of sharpshooters, psykers, and stormtroopers. Anything else? Priests could be an option for the countercharge use, or Iron Disipline to help rally your troops and keep them on the line. Another ( VERY MEAN) option is droptroopers and special weapon squads. Equip them with 2 x melta and a demo charge then watch the FUN! Hit enemy vehicles from the rear or take out terminators with them. They can also be used to take objectives. Sentinals can also be used this way.
Parker