Does a Farseer need to disembark from his wave serpent in order to use a psychic power like Doom or Guide? (I would have thought 'yes', but this is based on the fire point rule on p66 which may just cover psychic shooting attacks).
If not, is there any restriction on how fast the WS can move and still allow the Farseer to use his power? (If the above was 'no', I would have thought this one would be combat speed only, per passengers firing).
But I'd really be happy to be shown why I'm wrong.
Thankyou for your advice.