[Khailebron Heartrenders]

If a unit of Khinerai Heartrenders gets moved by the Mistress of Illusion spell from a Khailebron general, does it gain the Death from Above buff again since the Mistress of Illusion spell removes them and sets them up again

[DoK 2000pts help]

I'm considering buying more models to make my 1k army into a 2k army, but I'm not too sure if this army is a good choice

Allegiance: Daughters of Khaine
- Temple: Hagg Nar

Leaders
Morathi High Oracle of Khaine (480)
- Lore of Shadows: Mindrazor
Hag Queen on Cauldron of Blood (300)
- General
- Trait: Devoted Desciples 
- Artefact: Blood Sigil - Catechism of Murder 
- Prayer: Blessing of Khaine
Hag Queen (60)
- Prayer: Crimson Rejuvenation

Battleline
30 x Witch Aelves (270)
- Pairs of Sacrificial Knives
30 x Witch Aelves (270)
- Pairs of Sacrificial Knives
30 x Sisters of Slaughter (300)
- Barbed Whips and Blade Bucklers

Units
10 x Doomfire Warlocks (320)
- Lore of Shadows: The Withering

Total: 2000 / 2000
Extra Command Points: 0
Allies: 0 / 400
Wounds: 134
 

The only thing I haven't decided is to keep the warlocks, or to get more hag queens. Any suggestions?