Hm, it all depends really. Personally i prefer the flamer to the assault cannon. When used in specific missions the flamer can win you the game. Strategic placing of a flame template can make a potentially hairy situation turn into a 99% safe space for at least a turn. And with more strategic placing gain you quite a few turns, which combined with a few lucky cp rolls sometimes make it a bit of a instawin model. Other than that, tis what i would take too.