Yikes... Looking at the field, are you sure this is a fair matchup? Three slick-loader Demolishers against Space Marines on an open field with nearly no cover? 
I fully expect the Fists to slaughter the Valorans, which would suit the fluff nicely. If you are so sure that the Valorans will win, would you prefer the Fists to start the game off-table, so as to blunt the first turn's shooting?
Well, that said, I'll trust your confidence, as I'm sure you've played more games than I have. We'll see how it turns out.
I'm just itching to blow away a tac squad with a battle-cannon blast. Haven't done anything that satisfying since I vaped a Bloodthirster with a pair of Ionheads.
