[b]Susanoo[/b] has been great for me so far. I kill plenty of strikers rushing me in one shot with it. You have to be a warlock to use it though. You have to start your shot at the knees and let it ride up, but it is usually a OHK a little bit outside of striker range. Aside from Susanoo, if you want to get a OHK, then you need to go with the slow charge, high impact variety. In particular, the [b]Omolon Thesan FR4[/b] is an excellent choice. It is high impact, with reasonable range and stability, with relatively high aim assist. You can find a list of fusion rifles and their stats at the following link: [url=http://www.destinygamewiki.com/wiki/Fusion_Rifles]http://www.destinygamewiki.com/wiki/Fusion_Rifles[/url]