Yeah Trooper is a range tank class, which is quite interesting :P Troopers themselves are ranged, but the Vanguard advanced class is pretty much a close range class. They have a few 30m abilities, but the majority are sub 10m. If you want to be range then you should pick the Commando advanced class when it comes to the choice. To put it down simply, the two advanced classes. Vanguard is mid/close range Tank/DPS and Commando is Ranged DPS/Healer.