Had the thought for an Alliance heavy weapon for the Angleans, and one that would be rather lore friendly: A HERF weapon.
A HERF is a high energy radio frequency weapon, which in the most simple terms is a Microwave gun. Anyone who's ever seen those videos on YouTube of people microwaving an iPhone knows exactly what that can do to anything electronic.
Simply port over a few of the mechanics from the Voltaic Coil and possibly the Flamer. A charging weapon that deals higher and higher damage, and has more and more range, the longer you charge it, and when fired sends out a cone-shaped "pulse" that deals fantastic Shatter damage. At low charge, it has shorter range, less damage, but a much, much wider cone, while at higher charges it deals much higher damage and longer range, but has a more narrow cone and requires the enemy to be in juuust the right spot to hit.