[Miller]

Priest is easily the most solid class and is at the point where it barely needs any changes beyond maybe at most an SP crunch and possibly proper evade support. Almost every skill in its kit serves some purpose or has some funny niche can you pull off with it, even Gentle Torrent and Purify Poison.

IMO just leave the class be or just give more SP reductions with a slight buff to Gentle Torrent.