Annan's first response was... it was a good thing he had found Vasily previously.
The four buffs that appeared on him were the ones that Annan had discussed with Vasily earlier, confirmed to be powers he could be blessed with in the nightmare.
Mr. Radiance was the enemy of nightmares. As long as the power was used to combat nightmares, He could respond to almost all rituals.
In fact, the morning light that forcibly ends all nightmares at six o'clock every day comes from the power of Mr. Radiance. He clears nightmares for everyone regularly, regardless of whether they are His followers or not.
Unless they are priests of other gods.
Then they might be working... that is, purifying nightmares. To avoid disturbing the purification work of other gods' clergy, at six in the morning, only the nightmares of the clergy are not forcibly awakened.
