И дальше давай прочитаем
MANIFESTING PSYCHIC POWERS
The most common psychic action is the manifestation of psychic powers. Only the player whose turn it is can attempt to manifest psychic powers. If, after attempting to manifest a psychic power, you still have Warp Charge points left, you can attempt to manifest another psychic power with the same unit, or select another of your Psyker units and attempt to manifest a power the new unit knows. Assuming you have enough Warp Charge points, you can alternate back and forth between the same Psyker units in this way, but no unit can attempt to manifest the same psychic power more than once per Psychic phase.
ГВ не удосужилось вписать сюда ни слова про мастери лвл, но про варп чарджи сколько угодно.