1000pts for 2vs2 game - covens/kabals

Hi guys,
any sugestions about this list. Do you think balck heart is worth taking it instead of I don't know maybe haywire scourges? My partnesr will be playing Tau (broadsides and lots of drones.

Patrol Black Hart (just for labirynth of cunning and agents of vect) [total 105pts]
Archont + Venom blade + Phantasm grandes (3pts left so why not) [75]
5x Kabalites [30]

Vaguard Prophets of flash [total 895pts]
Hoemonculus + electrocorosive whip + nightmare doll [76]
5x Grotesques [175]
5x Grotesques [175]
5x Grotesques [175]
3x Talos + chain flails + Macro scalpel + Twin Haywire Blaster [294]

1000pts