It can work when you have 6+ raiders and venoms all deep strike at the same time(ally in an autarch for fun results).
I am actually thinking about playing pure melee DE/Eldar/Harlies after I get my railhead army finished.
Grotesques
Lhamaens
Harlies
Scorpions
Incubi
Reavers
All in venoms/raiders deep striking from reserves turn 2 with an autarch. Might even throw in a token banshee squad for fun.