[@Necroes] i hope you don't feel attacked with what i wrote.

And the dark heresy comparrison isn't 100% either, since during the releases, they changed their psyker system.
So you're probably going more with the later systems.

Where there are 3 ways to cast a power.

Normal. With the psykers normal psy rating. There is a chance that a phenomena happens.

Half. With half the psy rating, the power is weaker but there is no chance of phenomena.

Push. Double psy rating, dang powerful. Phenomena happens automatically!

Which is closer to the tabletop. And kinda closer to how it works in lore. I just dislike the system for other reasons. Not related to this RP.
So going with that system, the power was more akin to sending an invitation to the deamons in question, not summoning them in the classic sense.
Combined with the psyker being very powerful, he could do it with a Half. Since he's powerful, used to the power in question and the deamons stand for a lot of the energy in this case.
So i'm fine with this.

Although, technically, you are not the only psyker. True, the only psyker in the group. But i might join in later! >:D
(Depending on how much NOPE the characters feel about my character.)
However in a vs firefight my guy is kinda boned :P