I would try to save some points in HQ-choice and get a unit or 5 th/ss termies (200 points).
As the army is designed you will be near the enemy very fast and one unit of termies would support this very well. They can take quite a lot of fire and so you can enjoy the other units much longer.

What's about MM on your 2nd Dread? You could drop the Ironclad and MM-Dread in round 1 and could kill one or two heavy vehicle which will give your dreads some cover afterwards.