Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

So, units in reserve (such as deep strikers and what not) are rolled for and move onto the board at the beginning of the movement phase. The eldar powers doom, fortune, and guide are also cast at the beginning of the movement phase. So my question is which happens first? Is it possible to fortune/guide a unit that comes in from reserves? Is it possible to cast one of the above powers from a farseer that comes in via reserves? Could I place my deep strikers based on the knowledge of which enemy unit has been successfully doomed?

As far as I can tell, the psychic powers are used at the start of the eldar turn, but deep striking units come in at the start of your movement phase. My assumption would be that your actual player turn starts before the movement phase, therefore you must use the psychic powers before you bring in any reserves.

Yep, they're before the reserves arrive. SO a Farseer in reserves cannot cast any of those powers on the turn he arrives.