I whipped this up a while ago, and I'm pretty sure it needs some fixing.
HQ: Shadowseer w/ Powerblades and D-Field (135)
Elites: 3 Death Jesters w/ BL (171)
Death Jester w/ EML (62)
Solitaire w/ D-Field, Powerblades, Dread Mask, Tanglefoot Grenades, Hallucinogen Grenades, Haywire Grenades (179)
Troops: 2 5 Man Troup squads with 2 Shuriken Pistol/Power Weapon in each squad (157 a piece)
Heavy: Wraithlord w/SC (140)
Comes to 1001. Feel free to rip it apart. I play against marines mostly (BA, Chaos, and Deamonhunters.) I have never played a full Harliquins army before, but have fielded the Solitaire with much success.