The Rowdy Ranger is very versatile. At long rang, using double Light Gauss is a pleasure. When targets has under 500 meter add the 3 ERMLas. You will don't have any heat management problem. For the Brawl, you mainly use UAC20 and LGauss. L Gauss have quite the same cooldown with UAC20 & ERMLas. After some practice, it's possible to shoot all and torse twiste. If you need a big burst of damage to finish a target, the 3 RL10 are your friend. It's interesting to use it if your UAC20 jammed at a very bad moment. The Heat efficiency is very good (2x LGauss + UAC20 = Heat neutral), and LGauss are effective for Sniping and usable for Brawl. RL10 is not mendatory, you can remove it to had some amnos or/and upgrade armor.