An Illusion/Time Controller is tempting to suggest for a ranged character... but a Stalker just feels right with Assassin, Hide, Placate, Hide Proc, TP Foe, Pacify..
Stalker
Fire primary and secondary have 10 sec DOTs that you could slap on targets while you disappear and then assassinate them.
Elec/Shield has 2 teleport attacks that would come from nowhere.
Lots of the options work for a trickster.
If someone wanted a future feel maybe a Energy/Force Field Corruptor that could send targets flying and bouncing all over (not super team friendly but uber fun)