Hello,
If this hasn't already been pointed out somewhere else I would just like to put this scenario out there to see if it works (rules wise) and who many people have already thought about this.
A brood of Zoanthropes... lets say 3 of them. Behind a defence line with a quad gun, One of the zoanthropes is manning the gun emplacement.
Shooting phase, enemy target at 17" quad gun shoots. Psychic Brood rule now allows 3 shots with warp lance/blast.
Psychic brood - A zoanthrope brood follows all the rules for brotherhood of psykers except that the unit has a mastery level of 2. In addition, if a brood of zoanthropes uses the warp blast power, the number of shots fired is equal to the number of zoanthropes in that brood.
Benefits?
well you have a 3+ re-roll hits, 48" 4 shots skyfire intercept at S7 AP4... you can also fire the same amount of shots as a zoanthrope brood would be able to anyway (provided that you are not shooting from the same model which fires the quad gun.
Thoughts?