I reread the delque psyker rules again. It say you must select a discipline and you may choose a power from it. Thanks GW raw this would mean you pick of the power sets from the delaque book but could simply choose one of the powers and its associated ability from the book of outcasts. I'm fairly certain that this was the intention but at this point who knows. My preferred interpretation is that your first power must be from the delaque book but then may choose from the book of outcasts. I'm playing orlock in my current campaign but plan to play in a much larger campaign im running with delaque. Even though it would be less power I do feel its a fair way to both have the fun new powers but also keep things reasonable.
Yeah, as with most things the Rules aren't clear-cut here. But like I said earlier, it certainly can be argued that "Unless otherwise specified..." clause doesn't work for Delaque Psykers, since it actually
IS specified, how and what powers they are allowed to take at the start. Whether that's RaI of even was accounted for when the House of Shadow was written is anyone's guess at this moment.
So if you stick with this interpretation, Delaques have two options:
1. Take the starting power from one of three Delaque Disciplines, and then take additional powers from BoO Disciplines as skill advances, but miss out on the Discipline ability;
2. Buy Psycheteric Whispers, but opt not to take the starting Delaque power (since the wording allows not to take it), in order to then take BoQ powers as skill advances and gain the appropriate Discipline ability.
While the latter option does seem relatively strong, it's probably not outright broken, since a skill advance is 9XP.
Oh, BTW
@TopsyKretts , there's a potential error in BoO where it states that taking a random primary skill is 9XP and selecting one is 12XP. This is in the
USING WYRD POWER DISCIPLINES section on pg. 52, in a bullet point near the bottom of the page.