So I'm not certain if this should be here or in off-topic, but it is a question about Eldar so...

The imperium has Bionics to replace missing limbs and the like. Chaos have warp fuckery. Orks just rivet a robot arm to you and believe it'll work and does. What do the Eldar do when they want to continue the path of the warrior and lose a limb? Wraithbone prosthetic?

Not sure about craftworld, but the Dark Eldar can be totally regenerated from almost nothing via inflicting terrible angony on others, the psychic vampirism can regrow an entire Dark Eldar from near, beyond death, and in some cases from nothing more than a finger or other bit left over from an extreme unfortune.

In that sense the Eldar must certainly have advanced healing that probably relies on psychic energy. "Heal the spirit, the body will follow" is a direct quote from the DoW2 Warlock, thus making prosthetics obsolete as their bodies can heal the damage (over a long period of time.)

I have not read the books apart from the codexes, but as Warlocks and Farseers have the ability to mend flesh both in this game, TT, and even DoW, it's a safe bet they serve as "Doctors" and virtually no wound up until the point of death can be psychically manipulated back to its "perfect" form. Indeed, if there is any craft absolutely paramount to the preservation of precious life on the craftworld, it would be someone who can mend flesh and spend several lifetimes doing it... As I've never heard of a fleshmender/bloodbender path, I can only assume it falls to the Warlocks, and other Seer's.

I say "perfect" because I am not aware of Eldar undergoing any form of implantation of cybernetics. They wear highly advanced suits of armor - beyond the complexity of even the SMs, yet not a single implant is needed. I would therefore assume that they view cybernetics as barbaric and unnecessary to their superior way of achieving the same results; with their minds.

Thus, I think it's safe to assume Eldar do not need bionics and simply have another reason to view the other races that do as lesser beings that haven't figured out they don't need them either.

I've never heard any referrence to any disabled Eldar like ever, though that is probably due more to complete lack of background materiel / novels than anything else.

Though with Eldar I would suspect their medical advancements would have no problem growing replacement limbs for the disabled war vets, hence why you would never hear or see crippled Eldar.

Also, cybernetics seems very counter to a race of psychers, and is not very aesthetic in Eldar theme.

EDIT: I forgot about the psychic healing thing, and ya that would by far sound like the most probable solution as Demetri mentions.

for psykers there no bionics, just too primitive for selfcrystallising by their own superb power farseers, thou no need on bionics for craftworlds and exodites, for dark kin and, possibly, for outcasts, exiles and pirates - reasonable, but, again, it will be somewhat "art" things, in dark style or "nomadic", not cyberpank classic, but something near jewelry, without feeling of "augmentation"

Actually the pirates would have Bonesingers to keep the ships going so the healers wont be far removed from that. The exodites would likely have a healer of a sort as well and they still have singers to create weapons and structures.
The only ones truely cut off from Eldar healers would be the Rangers but even then, just how far are they really from a nearby webway access point. To get to where ever they are operating, they cant be that far...

Perhaps a Harlequin would have a prosthetic, more as a cruel but amusing joke than practicality.

Maybe Eldar medics are like Horse vets?

"I'm sorry Dave, your legs gone." *Pulls out pistol*
"Wait get a Warlock!"
*Bam* "Chuck this stone in a Wraith and let's call it a day."

Actually, it's quite explicitly stated in the Path of the Warrior book that there is a Path of the Healer. I don't know how far the healing would go, since Korlandril just had a massive wound in his abdomen, but the actual healing part of it is from Isha, a spiritual, physical, and mental healing.