Wraithguard = really good?

So, I picked up an Eldar codex (I know, I know). Wraithguard seem insanely good to me. If you take a full unit of 10 with a spiritseer (warlock) they count as a unit of troops. They have to be one of the toughest scoring units in the game. If you give the warlock the Enhance power (I think that power is made for wraithguard) they are WS5 S5 T6 I5! How does one kill 10 toughness 6 infantry that are in cover? Anything (in terms of small units or vehicles) the wraithguard shoot at is going to go away. They are fearless. The only unit they wouldn't want to fight in HtH would be an all-powerfist equipped unit like Nobz or Terminators. A massive hoard like 30 Ork Boyz might be able to overwhlem them, although they would need to roll lots of 6s. An Eldar army can have tons of strength 4 and 6 shooting for really cheap, which is great at whittling hoard armies down to size. Does anyone here have experience with wraithguard? How have they worked for you?

A unit of 10 with a warlock with the enhance power is 396 points. They are a bit expensive, but I really can't see a unit of berzerkers killing them in HTH if the wraithguard get a round of shooting at them first. Of course, it's all conjecture. The wraithguard will be close to 2 wraithlords which will help against assaults some. Wraithguard are no slouches in HTH either when they're enhanced. The warlock gets 2 str 9 attacks, and the unit is all str 5 tough 6. Everyone strikes at initiative 5 with WS 5.

They can't ride in a falcon, although you can put 5 plus a warlock in a wave serpent. Units smaller than 10 cannot count as troops however. So if you want a unit to hop out of a transport and shoot something dead, use fire dragons.