I have a pointless little quandry, and RT does more with Eldar than the rest, so I thought I'd post it here. Anyway, Eldar live in constant dread that Slaanesh will claim their souls, the it always hungers. Seers, using the warp as they do are often even more at risk. One of the iconic items Farseers are often seen with are their ghosthelms, which help to shield them from the depredations of the Empreyean. Still, one can often see even Farseers sporting cases of Space-Marine-sans-Helmetitus. When I looked through my old Cosex for Eldar, however, they have a little fluff bit where Eldrad, most senior of the race's Farseers, enters the Dome of Crystal Seers, at the core of Ulthwe. In this place alone can the elder Seer dare to remove his ghosthelm; the entry implies that anywhere less shielded Slaanesh would grab his "unprotected" soul. So, my question, how important is the helm to Seer Eldar? Eldrad is 10+ millennia old, and powerful by even Eldar standards, and he worries for his soul. Is there anything in the fluff for other Farseers?
Again, it's a pointless question, but I was curious, and sometimes it's fun to just chat fluff.
As an aside, would it be way BS to possibly allow a Seer to treat their Ghosthelm as a Psychic Hood? Individuals as learned about warpcraft as the Eldar, you might think they could emulate something similar.