If you wish to completely subvert the called shot gimmick, you can use a Man-at-Arms or a Houndmaster to protect the target along with making them way more survivable. Since the prophet marks a position and not a target, you can do a couple things to prepare for this. Preparing for the prophet is going to rely entirely on your team composition. His other, more threatening attack is Eye on You, a stress attack that can target 1-2 people randomly and can also stun them as well. Fulminate is a party-wide AoE that does little damage but also hits you with a Blight proc its meant to finish anyone off that's hanging on death's row at the time. The Prophet also has two other attacks, each not as threatening as the ceiling collapsing on you. For that, you will either need to stack long-range abilities in order to attack him from afar, or use the meat grinder mindset to bash your way across increasingly durable pews. It is, by all means, impossible to move him. While the initial gimmick is a big threat, the other half of this fight involves positioning The Prophet is in rank 4, behind several pews, and everything in this fight has maximum move resist. This move marks a rank with an attack that occurs at the end of turn, when said rank gets hit with Rubble of Ruin for heinous amounts of damage. The big gimmick of the Prophet is his free-action Calamitous Prognostication. This fight is a mix of reactive defenses, long-range assaults, and demolition if you're feeling a little greedy.

The Prophet is the second fight of the Ruins, and was also Red Hook's ultimatum for dealing with poor balance issues in regards to move/back row skills. Part 17: Boss Guide: The Prophet The Prophet

Darkest dungeon boss order