1500pt Dark Eldar

Hi guys, playing against a friend of mine who is a tyranid player. This is what I'm thinking of taking, bare in mind I am limited with what models I have.

Archon - clone field (80pts)

Mandrakes x4 (48pts)

Warriors x10
Raider - Night Shields, Splinter Racks (165pts)

Warriors x10
Raider - Night Shields, Splinter Racks (165pts)

Wyches x9 - Hekatrix w/ Agonizer (135pts)

Reavers x6 - 2x Caltrops (126pts)

Razorwing - Dark Lances, Night Shield, Nectrotoxin (165pts)

Razorwing - Dark Lances, Night Shield, Nectrotoxin (165pts)

Razorwing - Dark Lances, Night Shield, Nectrotoxin (165pts)

Scourges x5 - Four w/ Splinter Cannons (140pts)

Scourges x5 - Four w/ Splinter Cannons (140pts)

Total: 1494pts

A few things I'm unsure about;
Mandrakes? Probably just camp out on an objective.
Wyche squad, could take another 10 warriors but think wyches will be usefull for holding up units.
Nightshields on razorwings, I want them shooting as much as they can so why bump their jink?

Any advice is appreciated.

Drop the night shields off the razorwings. That would save u 45 points. The wyches without a transport are going to be dead in the water, if ur going to run them I would give them a raider. I would also drop the hekatrix.With the spare points u have from my suggestions, u can fit in a 3rd barebone raider. ( I believe my math is right on this).  If you don't have another raider, I would go with warriors .However, if u ran the warriors instead of the wyches, I'm not sure how to run the archon. I feel the archon should wield the agonizer over the hekatrix . You will get more bang for your buck because he gets more attacks then the hekatrix.

Ok, so I dropped the nightshields. Put splinter cannons on the razorwings.
Swapped the archon for a succubus (w/ agoniser), which will now be riding in a raider with 9 wyches.

remember that your flyers can fire their missiles on his flying monsters. that may come in handy at some point.

Really? How can I use large blast as an anti air weapon?

The "Hard to Hit" rule described in the section for Flyers and Flying Monstrous Creatures is not the same for both these. Against FMCs you can target them with blasts and templates as long as you have the Skyfire Rule.

Just read that.... Interesting.

Really? You can target FMCs with blast if you have skyfire? Not regular flyers?

Ok, update.
List was very effective. Although I was losing on points I tabled my opponent 5th turn.