If I were to do this I'd have either MM on the dreads, or a TLLC. Both bust armour, lascannons don't miss with the reroll, but are pricey, the MM practically guarentee a destruction if you hit. I think I'd go for the MM, as you only have 2 slow melta weapons in the army (CFs) so you are land raider fodder. And I expect you'll see land raiders in the club environment I think you'll be using this in.
You're pretty stupid, but it's fun, so who cares?