Welcome to Librarium Online!
I've just started out with Dark Eldar, but I was curious; Is it possible (and legal) to give for example, 2 different Sybarites (and even a Haemonculi) a WWP and open all of those, so you can pick from which portal your reserves come in?
yes it is fine to do that. In games over 1500 points it is generally considered unwise to use less than 2 portals.
The meat things seek to destroy ourselves. They hunt us as we hunt them but they are weak and uncertain. Bring them understanding of the power of ourselves through our strength and their fear. The inferior flesh will be entirely destroyed, all fragments will be smashed. Ourselves will fight to the last, all weak flesh must be consumed
Hi, as Bugs_n_Orks said, it is good insurance that you use more than one portal in bigger games as one the model carrying it could be destroyed before it is deployed thereby denying your reserve troops from ever coming onto the table. This is obviously not good.
The problem with using too many portals in smaller games is that it uses up points that could be spent elsewhere to better effect - that is the proportion of wargear to troops should always be in balance. Too many points on upgrades leaves not enough points for men on the ground.
Just a note of caution, be very wary of giving wargear to single wound models such as a sybarite as they die easily along with the wargear given to them. If you think the sybarite can do its job first then great , go for it but if there is a chance that he won't then go for a Haemonculus that has the benefit of 2 wounds.
And yes you can choose which portal to use after you have rolled for reserves, this is one of the great benefits of multiple portals and can really mess with your opponents head!
P.S. use the portal to get your assault based troops into combat (eg Talos, Wyches) and place the portal so that they can get the charge bonus as well.
Good luck and good hunting.
In a controversy the instant we feel anger we have already ceased striving for the truth, and have begun striving for ourselves.