i vote you do it, the psychic bitch slap you ultimately receive will be very cathartic for me. 


Not to mention im 100% sure the Eldar know Orks are not psykers in the traditional sense and would be very alarmed by a new brand of Ork psyker. A mutation like that would make the Orks extremely dangerous and Orks breeding asexually would mean if you are left alive for long there very well could be thousands or millions of this new brand of Ork that are warp sensitive. So, Im sure the Eldar wouldn't mind jeopardizing a strike team to kill you with extreme prejudice. Which would be a small danger as they are boarding a ship that has little or no defensive ability and i expect they would figure out that the ship is suffering from internal strife pretty quickly.

OH! and their fleet is going to be going mad trying to get that ship with the stones back. Chances are good that there will be many strike teams sent aboard to retrieve the stones. It would only be a little out of their way to remove a potential major threat to the galaxy. So, please, go for it. Ill hide in the armory and let the eldar cleanse the ship for me, removing problems like... security forces, the captain, Orks, chaos marines... Then ill have free reign of the ship or get picked up by another and start my pirate adventure over there.