Constellation: Thunder Lizards Battalion: Thunderquake Temple-host 2000 pts Leaders: x 1 Stegadon with Skink Chief - General - Prime Warbeast + Fusil of Conflagration + Skystreak Bow Units: x 2 Salamander Hunting Pack Behemoths: x 3 Stegadons w/ Sky-Streak Bows x 3 Bastiladons w/ Solar Engines. Basically my Stegadons take and hold ground, while my Salamanders, and Solar Engines just deal out insane amounts of damage.
The main problem with your list is that any army will outscore you. You won't always have enough punch to quickly kill your opponent's scoring units. But concept of Stegageddon is great.
I really want monster mash to work as well. Hopefully GW will cave and make all Behemoths count as 10 models for objective scoring.