Perhaps drop the Ancient down to a bog-standard Haemie and use the points saved to give the other two a Liquifier as well, that is how I always take them. If you can give each a Venom Blade too, that's a nice, cheap upgrade.
Personally, I would also switch the DL's on your 3 Raiders to Disintegrators to get a bit more volume of fire.
It's a good list, might not have much staying power for objectives, so maybe consider swapping one unit of Warriors for some Wracks, and if so give them another Liquifier.
Cheers.
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