Only time RNG is any worse of a TP feeder than other DDs is when Barrage is ready. Considering the recent AGI change and how some of the popular gear boasts that, as well, RNG does sometimes get some indirect Subtle Blow. The biggest and legitimate gripe for the class is indeed how drawing a mob's focus winds up hurting everyone else in some manner and why the whole ranged -enmity thing really needs looked into.