RadmanDo they only use rockets, railgun, lightning gun? Are all the other weapons just bad, or situational?
Incredibly situational. Depends really on the player, the map and what stacks are like. If someone is like sub ~20 hp I normally go for machinegun or shotgun but some people perfer to rail or LG them. Weapons like Plasma and grenade launcher are normally used to spam out areas/deny weapons and items. Rockets rails and LG are really the most used in QL because of their consistent damage. Granted this is all assumed from watching a few QL duels so I might be a tad off.