Hi there,
First off is this by any chance for schools league? If it is Hello fellow schools leaguer
So A Few bit's and Pieces on the list, I believe you should keep everything as cheap as chips for Deldar especially at this points level. The Succubus I would change for a Haemonculus with liquifer. 25 Point's less and gives the unit feel no pain, Great! Second they wyches look fine, but I would go for agoniser instead to make up for your strength 3. The Raider they're in I wouldn't go for a shock prow, Points spent better else where. for Example a Flickerfield, That 5++ can really help in times of need. 3rd the warrior squads. It will be alot better to reduce them to 5 with a blaster and then smack them in a venom. You get them same amount of darklight weaponry but two splinter shots less but you save 45 points a unit which is alot to spend on 2 shots

That should bring you to 500 Points dead. You could then drop 2 wyches to make it 480 and add a ravager with
FF for 115 this then makes up for a lack of antitank your list seems to have at the minute. and then that 5 Points can go to the Shock Prow if you want