What if Starscream actually led the 'Cons? He'd have twin Fusion Boosters, that's what. And they'd attach in Jet mode to make him fly even faster!
When you let Starscream finally have the power he desires, what could be better than rubbing it in his former master's face by giving him twin Fusion Cannons? Three missiles either side was never enough to really obliterate the remaining 'Bots. A fusion cannon on each arm...that's twice the firepower that Megatron had!
Shapeways Fusion Boosters page
To add insult to injury, these Fusion Cannons aren't spiked just to look cool. They aren't sloped and sheared just for looks either. They're made to pierce the air, and when they're attached to the side of Starscream's Jet mode, entering orbit is a very real possibility. Powered by Dark Energon, even Starscream struggles to control his flight. He'd never admit that, of course.
Shapeways Fusion Boosters page
As always, comments and criticisms are welcome and appreciated.