Hello

  For my 2nd run I try to play a principal priest, I do not especially like xoti. But I discovered that much less I like to play interpreting a priest, and much less with pallegrina in the group, doing anything referring to gods is negative for her.

  So the solution is to play without a priest, but I do not know if it is viable in the maximum difficulty with level scale. I would like you to leave your opinion and what strategies you would use.

You should be fine. You can take healing abilities on Pallegina, and/or pick up Tekehu. As a Druid/Chanter he is one of the best healers in the game. Main thing you will miss out on is the buffs (mainly accuracy) such as Devotions of the Faithful.