1500pt for friendly tournament

Hi I am entering a friendly tournament and have to submit my list this weekend so would appreciate some feedback/advice on my list below:

HQ: Farseer (Jetbike, Shard of Anaris)
Troop: Rangers (x5)
Troop: Windrider Jetbike Squad (x6, 2 x Shuriken Cannon)
Troop: Windrider Jetbike Squad (x6, 2 x Shuriken Cannon)
Fast Attack: Warp Spiders (x5)
Fast Attack: Shining Spears (x5, Exarch, Star Lance, Monster Hunter, Hit & Run)
Heavy Support: War Walker Squadron (x2, 2 x Bright Lance)
Heavy Support: Night Spinner

Allied HQ: Baron Sathonyx
Allied Troop: Wyches (x5, Haywire Grenades)
Allied Dedicated Transport: Venom (2 x Splinter Cannon, Grisly Trophies)
Allied Fast Attack: Beastpack (x3 Beastmasters, x10 Khymerae, 2 x Razorwing Flock)
Allied Heavy Support: Ravager (3 x Dark Lances)

Total = 1500

I have won three practice games, two convincingly against marines and guard and one by the skin of my teeth against tau. All the dark eldar units performed well, with the beastpack+farseer+baron as MVP's in each game. However the eldar section had mixed performance, the night spinner was underwhelming, the warp spiders were useful but felt too small and the shard of anaris had limited impact.

Would you have any advice regarding improving the list? I had considered dropping the Night Spinner, Warp Spiders and Shard of Anaris for a stock Wraithknight to advance alongside the beastpack, would this be effective?