i read in a PCGamer arcticle on Huxley that phantoms will be able to use all long ranged weapons inlcuding Sniper Rifles, AS WELL AS Rocket Launchers

WHO KNEW? This arcticle was written in beta so i don't know if they are still doing that or wat not. Also the phantom will also be able to use some sort of short range teleportation, as well as short range weapons like i dunno an assault rifle or machine gun. The only thing that makes them different from the othere classes is the fact that they have less armor and more speed. So what you could do is charge at an enemy. As soon as he starts firing teleport thru him pull a 180 then shoot him in the back. Priceless.