If you needed to be right at 1500, this is what I'd do:
Drop the blasters from all the warrior squads so that they're specialized, not wasting shots. Drop the WWP from the haemonculus for all the same reasons you always see me say: Dark artisan won't be able to charge till turn 3 if you reserve them, and firing 1 heat lance against the back of a vehicle on turn 2 isn't worth 45 points and the loss of 2 turns of table presence. I'd also drop 1 Medusae to pay for what I'm going to suggest next.
That leaves you 130(after accounting for fixing the 15 point overage).
I don't normally make custom lists, rather just all comers lists, but since you are tailoring, you may as well take a space marine deleter, aka triple dissie ravager for 110 points. As a matter of fact, they're so good at that job, I'd recommend dropping 2 units of warriors/venoms too, which would give you exactly enough points to pay for 3 triple dissie ravagers and a twin-linked haywire blaster on your Talos so he's useful from turn 1 with a 24" threat range. So the list would look like this:
3 Medusae in a Raider with night shields
Archon with Blaster and WWP
5 Warriors in Venom with dual canon
Razorwing with Lances
Ravager w/ Disintegrator Cannons(9 AP2 shots each)
Dark Artisan with spirit probe and twin-linked haywire blaster.
If you ARE allowed the 1% leeway, I'd do all the above exactly the same, except I'd add a haywire grenade to the archon, and an ichor injector to your talos.