It's hardly new, but I reckon the best synergy is still offered by a Farseer on Jetbike with some Guardian Jetbikes as your mandatory HQ/Troop. After that, I suppose it depends what you like.
It's interesting that in the new Codex: Eldar, the Shadowseer's veil of tears has gone back to it's old game mechanic (affecting spotting distance), although it's a psychic power, so you have to take a test to use it. I much prefer the way it works according to our faq, but I guess it's only a matter of time before GW change that to bring both listings into line.
From a fluff perspective, I don't see eldar using wraithbone constructs as their allies. Though you never know with the dark kin.
Although there is a precedent for it - p.23 of our codex, "An Unexpected Ally". That's painted very much as a one-off, though.
From a fluff point of view, I also can't really see Wraith constructs fighting alongside the Dark Kin on a regular basis, which is a shame, as the fear-inducing wraithfighter fits really well with the feel of DE. I would be inclined to field one anyway, but just claim that the morale effects are some creation of the Haemonculi, rather than a psychic thing ... or maybe it doesn't matter.