Wraithknight or 3x War Walkers?

I have been practicing and learning how to use my army of 1000 points for about 2 weeks now, and in that time I've learned a lot! Here's what I have

- 1x Archon with 4x Blasterborn in a Venom
- 4x squads of five Kabalite Warriors in Venoms
- 2x Ravagers

I've recently added 1x Farseer on a Jetbike (giving him Mantle of the Laughing God) and 3x Windrider Jetbikes for objective-grabbing purposes. However I am on the fence when it comes to selecting an Eldar Heavy Support unit. So far the options I'm happy with are either: (a) a Wraithknight or (b) 3x War Walkers.

Which choice do you guys think would be the most competitive?

It really depends what you're looking for. War Walkers have more firepower but are probably a bit easier to kill. Wraithknights have decent firepower, and have access to something we lack elsewhere, S10 shooting. They're also pretty decent in close combat and can act as real fire magnets.

Wraithknight - as an agent of mayhem and fire magnet.