2500pt Coven List after not playing for ~6 years.

As the title indicates, I last played my Deldar in 2011.  I had moved and sold the entire army off; so, I started building from scratch again.  I wanted a coven army back then and I want one now.  Yes, I realize that coven lists may be beyond suboptimal right now, but what the hell.  Forcing myself not to power-game.  Also, since I haven't built a list in years... I'm sure I've made some mistakes.

1 Battalion Detachment; 1 Vanguard Detachment.

Batallion Detachment:

HQs

• -Urien Rakarth (Warlord with Master Regenerist) - 112pts
  -Haemonculus - 96 pts
      -Crucible
      -Electrocorrosive Whip
      -Liquifier gun
      -Parasite's kiss
  

Troops

• -Wracks x5 - 88 pts
     -Acothyst with electrocorrosive whip, liquifier gun
     -1 wrack with ossefactor
  -Wracks x5 - 88pts
     -Acothyst with electrocorrosive whip, liquifier gun
     -1 wrack with ossefactor
  -Wracks x9 - 132 pts
     -Acothyst with electrocorrosive whip, liquifier gun
     -1 wrack with ossefactor
  

Fast Attack

• -Scourges x5 - 150pts
      - Solarite with shardcarbine
      - 4 Dark Lances
  -Scourges x5 - 150pts
      - Solarite with shardcarbine
      - 4 Dark Lances
  

Heavy Support

• -Cronos x1 - 115 pts
      -Spirit Vortex
  -Talos x3 - 366 pts
      - All equipped with two macroscalpels and stinger pods
  -Ravager - 156 pts
      -Shock Prow
      - 3 Dark Lances
  

Dedicated Transports

• -Raider - 116 pts
      -Shock Prow
      -Dark Lance
  -Venom - 95 pts
      - x2 Splinter Cannons
  -Venom - 95 pts
      - x2 Splinter Cannons
  

Vanguard Detachment:
HQ

• -Haemonculus - 96 pts
      -Crucible
      -Electrocorrosive Whip
      -Liquifier gun
      -Parasite's kiss
  

Elites

• -Grotesques x5 - 200 pts
      -Flesh Gauntlets and Monstrous Cleavers
  -Mandrakes x5 - 95 pts
      -Stock
  -Mandrakes x5 - 95 pts
      -Stock
  

I'm okay with some units not technically being coven.  I might entertain adjusting the list to be strictly coven after our codex comes out.  We'll see.

*Edit for Ossefactors where possible.