What gods are worshiped here?

The Twelve, of course. Some more than others especially among dualists.

Who are dualists?

Dualists are puritans, who consider Praios as the bringer of joy and Boron as evil. The rest of the gods don’t matter or are only worshiped as vassals of Praios and Boron. An exception is Firun, since he is regarded as the mediator between the two main gods.