Drop Urien. He's incredibly expensive, equivalent of 3 tooled up Haemonculi or a full unit of something else. He's also as frail as regular Haemonculi, and all he does is allow you to give +1
Str to your grots and pass around a few more pain tokens.
At 1500pts in my coven I have 2 squads of 3 grotesques (liquifier,
ab w/ venom blade) with haems (venom blade, liquifier gun) in raiders, 2 raiders of 10 wracks with liquifiers and acothysts, then 2 squads of wracks with hex rifles in venoms, 2 talos with
tl liquifiers and haywire blasters and a razorwing.
Uriens 190pts is a whole other unit, or 3 more haemonculi.
Your Haemonculi want to have a Liquifier gun, and if they're seeing combat either a Venom Blade or Agoniser.
For the grotesques, now youve dropped Urien, have 5 with a liquifier gun, an abberation with either a Venom Blade or Scissorhand. (Re-rolls to wound on anything with T5 or less

) with a standard Haem.
The Wracks on foot coming out of the
WWP bump to a 10 man squad, with 2 liquifiers, add a Haem with a liquifer - 3 templates then the charge will drop most anything in a blitz.
I'd also consider trying to fit a 3rd talos in the list.